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RTCA SC EUROCAE WG

VIEWS: 10 PAGES: 36

									                     SPR Draft E (FAA Evaluation Release) 30 April 2009




DATA COMMUNICATIONS SAFETY AND PERFORMANCE
              REQUIREMENTS




               Draft E F
           30 April19 October 2009




                                                                     1
SPR Draft E (FAA Evaluation Release) 30 April 2009




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                                                                                              SPR Draft E (FAA Evaluation Release) 30 April 2009
                                                                     TABLE OF CONTENTS

1      INTRODUCTION ..................................................................................................................................................... 1
    1.1        Purpose ................................................................................................................................................................. 2
    1.2        Scope .................................................................................................................................................................... 2
    1.3     Relationships to Other Documents ....................................................................................................................... 3
       1.3.1 ICAO Material ................................................................................................................................................... 3
       1.3.2 Approval Material ............................................................................................................................................ 3
    1.4     Document Description .......................................................................................................................................... 4
       1.4.1 Document Organization ................................................................................................................................... 4
       1.4.2 Requirement and Recommendation Numbering Methodology ...................................................................... 4
       1.4.3 Acronyms and Glossary of Terms ..................................................................................................................... 5
    1.5        References ...................................................................................................................................................... 1711

2      ATS FUNCTIONS ............................................................................................................................................... 1913
    2.1.1      ATS Functions Supported by Data Communications ....................................................................................... 1913
    2.1.2      Data Communications Operational Capabilities Services ............................................................................... 2014
    2.2     Data Link Applications and Services Supporting ATS Functions ..................................................................... 2115
       2.2.1 Provision and Use....................................................................................................................................... 2216

3      Environmental Types and Characteristics ........................................................................................................ 2317
    3.1        Sector Density Calculations ............................................................................................................................ 2317
    3.2     Environment A - Mixed Performance Airspace ............................................................................................... 2418
       3.2.1 Environment A Operations ........................................................................................................................ 2519
       3.2.2 Environment A Characteristics ................................................................................................................... 2519
    3.3     Environment B – High Performance Airspace ................................................................................................. 2620
       3.3.1 Environment B Operations......................................................................................................................... 2721
       3.3.2 Environment B Characteristics ................................................................................................................... 2721

4      Context Management (CM) Application ................................................................. Error! Bookmark not defined.23
    4.1     Description of Data Link Services Based on CM Application............................... Error! Bookmark not defined.23
       4.1.1 Data Link Initiation (DLIC) Service OSD ......................................................... Error! Bookmark not defined.23
    4.2        CM Safety and Performance Requirements........................................................ Error! Bookmark not defined.33

5      Controller-Pilot Data Link Communication (CPDLC) Application ............................. Error! Bookmark not defined.41
    5.1     Description of Data Communications Services Based on CPDLC Application ..... Error! Bookmark not defined.41
       5.1.1 ATC Communications Management (ACM) Service OSD .............................. Error! Bookmark not defined.41
       5.1.2 ATC Clearance (ACL) Service OSD.................................................................. Error! Bookmark not defined.65
       5.1.3 ATC Microphone Check (AMC) Service OSD ................................................. Error! Bookmark not defined.71
       5.1.4 Departure Clearance (DCL) Service OSD ....................................................... Error! Bookmark not defined.75
       5.1.5 Data Link Taxi (D-TAXI) Service OSD.............................................................. Error! Bookmark not defined.79
    5.2     CPDLC Messages...............................................................................................Error! Bookmark not defined.102
       5.2.1 CPDLC Uplink Message Elements ................................................................ Error! Bookmark not defined.103
       5.2.2 CPDLC Downlink Message Elements ........................................................... Error! Bookmark not defined.125
       5.2.3 CPDLC Message Variables and Range and Resolution ................................ Error! Bookmark not defined.135


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                                                                             SPR Draft E (FAA Evaluation Release) 30 April 2009
      5.2.4    Message Attributes ..................................................................................... Error! Bookmark not defined.150
      5.2.5    Message Response Requirements .............................................................. Error! Bookmark not defined.156
      5.2.6    Specific CPDLC Message Rules .................................................................... Error! Bookmark not defined.158
      5.2.7    Data Conventions ........................................................................................ Error! Bookmark not defined.160
      5.2.8    Dialogue Types ............................................................................................ Error! Bookmark not defined.165
      5.2.9    Free Text in Messages ................................................................................. Error! Bookmark not defined.165
      5.2.10   Abnormal Mode Processing ........................................................................ Error! Bookmark not defined.166
    5.3     CPDLC Safety and Performance Requirements ................................................. Error! Bookmark not defined.172

6     Automatic Dependent Surveillance-Contract Application ..................................... Error! Bookmark not defined.203

7     Flight Information Services Application ................................................................ Error! Bookmark not defined.204
    7.1     Description of Data Communications Services Based on D-FIS Application ..... Error! Bookmark not defined.205
       7.1.1 Data Link Operational Terminal Information (D-OTIS) Service OSD ........... Error! Bookmark not defined.206
    7.2     D-OTIS Safety and Performance Requirements ................................................ Error! Bookmark not defined.235




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                                                                                   SPR Draft E (FAA Evaluation Release) 30 April 2009
                                                                TABLE OF TABLES
Table 1-1:           Requirement and Recommendation Identifiers ............................................................................. 4
Table 2-1:           Data Link Applications and Services Supporting ATS Functions in Environment A ............ 2115
Table 2-2:           Data Link Applications and Services Supporting ATS Functions in Environment B............. 2115
Table 3-1:   Sector Traffic Density as Average Aircraft Per Sector Hour and Peak Instantaneous Aircraft
    Count (PIAC) .......................................................................................................................................... 2418
Table 3-2:           Mixed Performance Airspace Environmental Characteristics ................................................ 2519
Table 3-3:           High-Performance Airspace Environmental Characteristics................................................... 2721
Table 1-1:           Requirement and Recommendation Identifiers ............................................................................. 4
Table 2-1:           Data Link Applications and Services Supporting ATS Functions in Environment A ................ 21
Table 2-2:           Data Link Applications and Services Supporting ATS Functions in Environment B................. 21
Table 3-1:   Sector Traffic Density as Average Aircraft Per Sector Hour and Peak Instantaneous Aircraft
    Count (PIAC) .............................................................................................................................................. 24
Table 3-2:           Mixed Performance Airspace Environmental Characteristics .................................................... 25
Table 3-3:           High-Performance Airspace Environmental Characteristics....................................................... 27
Table 4-1:           DLIC Initiation Function Operating Method .............................................................................. 25
Table 4-2:           DLIC Contact Function Operating Method ................................................................................ 27
Table 4-3:           DLIC Update Function Operating Method ................................................................................. 29
Table 4-4:           DLIC Messages, Content and Applicable Function ....................................................................31
Table 4-5:           DLIC Message Variables ............................................................................................................ 32
Table 4-6:           Allocation of Safety and Performance Requirements to the CM Application ............................ 35
Table 1-1:           Requirement and Recommendation Identifiers ............................................................................. 4
Table 2-1:           Data Link Applications and Services Supporting ATS Functions in Environment A ................ 21
Table 2-2:           Data Link Applications and Services Supporting ATS Functions in Environment B................. 21
Table 3-1:   Sector Traffic Density as Average Aircraft Per Sector Hour and Peak Instantaneous Aircraft
    Count (PIAC) .............................................................................................................................................. 24
Table 3-2:           Mixed Performance Airspace Environmental Characteristics .................................................... 25
Table 3-3:           High-Performance Airspace Environmental Characteristics....................................................... 27


Table 5-1:    Transfers from T-ATSU to R-ATSU, Both ATSUs CPDLC Equipped, Frequency Change                                                                            Formatted: Do not check spelling or grammar
    Instruction Concurrent with Data Communications Transfer Operating Method .......................................45
Table 5-2:    Transfers From T-ATSU to R-ATSU, Both ATSUs CPDLC Equipped, Frequency Change                                                                            Formatted: Do not check spelling or grammar
    Instruction Independent from Data Communications Transfer Operating Method ....................................48
Table 5-3: Transfers from T-ATSU Not CPDLC Equipped to CPDLC Equipped R-ATSU Operating                                                                                Formatted: Do not check spelling or grammar
    Method ..................................................................................................................................................... 51
Table 5-4:   Transfers From CPDLC Equipped T-ATSU to R-ATSU Not CPDLC Equipped, Frequency                                                                             Formatted: Do not check spelling or grammar
    Change Instruction Concurrent With Data Communications Transfer, Operating Method ........................ 53

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                                                                                       SPR Draft E (FAA Evaluation Release) 30 April 2009
Table 5-5:   Transfers From CPDLC Equipped T-ATSU to R-ATSU Not CPDLC Equipped, Frequency                                                                                       Formatted: Do not check spelling or grammar
    Change Instruction Independent From Data Communications Transfer Operating Method ...................... 56
Table 5-6: Transfers and/or Change of Frequency with No Change in the Established CPDLC Operating                                                                               Formatted: Do not check spelling or grammar
    Method ..................................................................................................................................................... 58
Table 5-7:           Flight Crew Requested Change of Frequency Using CPDLC .................................................... 61                                              Formatted: Do not check spelling or grammar

Table 5-8:           C-ATSU Ends CPDLC without Transfer of CPDLC or Change of Frequency Operating Method                                                                        Formatted: Do not check spelling or grammar
                     ..................................................................................................................................................... 63
Table 5-9:           ACL Request Operating Method.................................................................................................66                            Formatted: Do not check spelling or grammar

Table 5-10:          ACL Uplink Messages Requiring a Response Operating Method .............................................. 68                                                Formatted: Do not check spelling or grammar

Table 5-11:          ACL Uplink Message Not Requiring a Response Operating Method ........................................69                                                    Formatted: Do not check spelling or grammar

Table 5-12:          ACL Downlink Message Not Requiring a Response Operating Method....................................70                                                       Formatted: Do not check spelling or grammar

Table 5-13:          AMC Addressed and Broadcast Operating Methods ..................................................................73                                         Formatted: Do not check spelling or grammar

Table 5-14:          DCL Flight Crew Departure Clearance Request Operating Method........................................... 76                                                 Formatted: Do not check spelling or grammar

Table 5-15:          DCL ATSU System/Controller Initiated Operating Method ...................................................... 77                                            Formatted: Do not check spelling or grammar

Table 5-16           D-TAXI Departure Information Request Operating Method ...................................................... 81                                            Formatted: Do not check spelling or grammar

Table 5-17:          ATSU/ Controller Initiated D-TAXI Departure Information Operating Method........................ 82                                                        Formatted: Do not check spelling or grammar

Table 5-18           D-TAXI Start-Up Request Operating Method ............................................................................ 83                                   Formatted: Do not check spelling or grammar

Table 5-19:          ATSU/Controller Initiated D-TAXI Start-Up Operating Method ............................................... 85                                              Formatted: Do not check spelling or grammar

Table 5-20:          D-TAXI Push-Back Clearance Request Operating Method ........................................................ 86                                            Formatted: Do not check spelling or grammar

Table 5-21           Controller Initiated D-TAXI Push-Back Operating Method ....................................................... 87                                          Formatted: Do not check spelling or grammar

Table 5-22:          D-TAXI Taxi-Out Request Operating Method ........................................................................... 88                                    Formatted: Do not check spelling or grammar

Table 5-23:          Controller Initiated D-TAXI Taxi-Out Operating Method ......................................................... 89                                         Formatted: Do not check spelling or grammar

Table 5-24:          D-TAXI Arrival Taxi Information Request Operating Method .................................................. 91                                             Formatted: Do not check spelling or grammar

Table 5-25:          ATSU/Controller Initiated D-TAXI Arrival Taxi Information Operating Method ..................... 92                                                        Formatted: Do not check spelling or grammar

Table 5-26:          D-TAXI Taxi-In Clearance Request Operating Method ............................................................. 93                                         Formatted: Do not check spelling or grammar

Table 5-27:          Controller Initiated D-TAXI Taxi-In Operating Method ............................................................ 94                                       Formatted: Do not check spelling or grammar

Table 5-28:          D-TAXI Update Request Operating Method .............................................................................. 95                                   Formatted: Do not check spelling or grammar

Table 5-29:          Controller Initiated D-TAXI Update Operating Method ............................................................ 97                                        Formatted: Do not check spelling or grammar

Table 5-31:          Taxiway Guidance Lines ........................................................................................................... 101                     Formatted: Do not check spelling or grammar

Table 5-32:          CPDLC Uplink Message Elements ........................................................................................... 103                              Formatted: Do not check spelling or grammar

Table 5-33:          CPDLC Downlink Message Elements ...................................................................................... 125                                 Formatted: Do not check spelling or grammar

Table 5-34           : CPDLC Message Variables, Range, and Resolution .............................................................. 135                                        Formatted: Do not check spelling or grammar

Table 5-35:          Urgency Attribute...................................................................................................................... 150                Formatted: Do not check spelling or grammar

Table 5-36:          Alert Attribute ........................................................................................................................... 151            Formatted: Do not check spelling or grammar

Table 5-37:          Response Attribute (Up-Link) ...................................................................................................152                        Formatted: Do not check spelling or grammar

Table 5-38:          Specific CPDLC UM Permitted Responses .............................................................................. 152                                   Formatted: Do not check spelling or grammar

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                                                                                 SPR Draft E (FAA Evaluation Release) 30 April 2009
Table 5-39:          Response Attribute (Down-Link) .............................................................................................. 154            Formatted: Do not check spelling or grammar

Table 5-40:          Suggested CPDLC Uplink Responses....................................................................................... 154                  Formatted: Do not check spelling or grammar

Table 5-41:          Aircraft Error Processing ..........................................................................................................166      Formatted: Do not check spelling or grammar

Table 5-42:          ATSU Error Processing............................................................................................................. 167       Formatted: Do not check spelling or grammar

Table 5-43:          Aircraft System Abnormal Mode Processing ............................................................................169                     Formatted: Do not check spelling or grammar

Table 5-44:          ATSU System Abnormal Mode Processing .............................................................................. 170                      Formatted: Do not check spelling or grammar

Table 5-45: Safety and Performance Requirements for the Controller Pilot Data Link Communications                                                                 Formatted: Do not check spelling or grammar
    (CPDLC) Application ............................................................................................................................... 173




                                                              TABLE OF FIGURES
Figure 1-1:          Overview of the CNS/ATM System ............................................................................................. 2
Figure 2-1:   Notional relationship of ATS, ATS Functions, Communication, Navigation and Surveillance
    Capabilities, and Data Communications Services ................................................................................... 1913
Figure 3-1:          Worst Case Traffic Demand Growth ...................................................................................... 2418
Figure 1-1:          Overview of the CNS/ATM System ............................................................................................. 2
Figure 2-1:   Notional relationship of ATS, ATS Functions, Communication, Navigation and Surveillance
    Capabilities, and Data Communications Services ....................................................................................... 19
Figure 3-1:          Worst Case Traffic Demand Growth .......................................................................................... 24
Figure 4-1:          Overview of DLIC Message Exchanges ..................................................................................... 25
Figure 4-2:          DLIC Initiation Function Operating Method Diagram ............................................................... 27
Figure 4-3:          DLIC Contact Function Operating Method Diagram..................................................................29
Figure 4-4:          DLIC Update Function Operating Method Diagram ..................................................................30
Figure 1-1:          Overview of the CNS/ATM System ............................................................................................. 2
Figure 2-1:   Notional relationship of ATS, ATS Functions, Communication, Navigation and Surveillance
    Capabilities, and Data Communications Services ....................................................................................... 19
Figure 3-1:          Worst Case Traffic Demand Growth .......................................................................................... 24


Figure 5-1:          Overview of ACM Message Exchanges ..................................................................................... 44                   Formatted: Do not check spelling or grammar

Figure 5-2:  Operating Method Diagram for Transfers from T-ATSU to R-ATSU Both ATSUs CPDLC                                                                        Formatted: Do not check spelling or grammar
    Equipped; Frequency Change Instruction Concurrent with Data Communications Transfer ..................... 48
Figure 5-3:  Operating Method Diagram for Transfers from T-ATSU to R-ATSU Both ATSUs CPDLC                                                                        Formatted: Do not check spelling or grammar
    Equipped; Frequency Change Instruction Independent from Data Communications Transfer .................. 51
Figure 5-4: Transfers from T-ATSU Not CPDLC Equipped to CPDLC Equipped R-ATSU Operating                                                                           Formatted: Do not check spelling or grammar
    Method Diagram ......................................................................................................................................... 53

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                                                                                    SPR Draft E (FAA Evaluation Release) 30 April 2009
Figure 5-5:  Transfers from T-ATSU CPDLC Equipped to R-ATSU Not CPDLC Equipped, Frequency                                                                              Formatted: Do not check spelling or grammar
    Change Instruction Concurrent with Data Communications Transfer Operating Method Diagram ........... 55
Figure 5-6:  Transfers From CPDLC Equipped T-ATSU to R-ATSU Not CPDLC Equipped, Frequency                                                                              Formatted: Do not check spelling or grammar
    Change Instruction Independent From Data Communications Transfer, Operating Method Diagram ......58
Figure 5-7: Transfers and/or Change of Frequency with No Change in the Established CPDLC Operating                                                                     Formatted: Do not check spelling or grammar
    Method Diagram ......................................................................................................................................... 61
Figure 5-8:           Flight Crew Requested Change of Frequency ............................................................................. 62                       Formatted: Do not check spelling or grammar

Figure 5-9: C-ATSU Ends CPDLC without Transfer of CPDLC or Change of Frequency Operating Method                                                                        Formatted: Do not check spelling or grammar
    Diagram ..................................................................................................................................................... 64
Figure 5-10:          ACL Service Operational Context .............................................................................................. 66                Formatted: Do not check spelling or grammar

Figure 5-11:          ACL Request Downlink Message Requiring a Response Operating Method Diagram .............. 67                                                     Formatted: Do not check spelling or grammar

Figure 5-12:          ACL Uplink Messages Requiring a Response Operating Method Diagram ............................... 69                                             Formatted: Do not check spelling or grammar

Figure 5-13:          ACL Uplink Message Not Requiring a Response Operating Method Diagram ......................... 70                                                Formatted: Do not check spelling or grammar

Figure 5-14:          ACL Downlink Message Not Requiring a Response Operating Method Diagram ..................... 71                                                  Formatted: Do not check spelling or grammar

Figure 5-18:          AMC Service Operational Context ............................................................................................. 72                 Formatted: Do not check spelling or grammar

Figure 5-19:          Addressed AMC Operating Method Diagram............................................................................. 73                           Formatted: Do not check spelling or grammar

Figure 5-20:          Broadcast AMC Operating Method Diagram ............................................................................. 74                          Formatted: Do not check spelling or grammar

Figure 5-15:          Overview of DCL Message Exchanges ...................................................................................... 76                      Formatted: Do not check spelling or grammar

Figure 5-16:          DCL Flight Crew Departure Clearance Request Operating Method Diagram ............................ 77                                             Formatted: Do not check spelling or grammar

Figure 5-17:          ATSU System/Controller Initiated Departure Clearance Operating Method Diagram ............... 78                                                 Formatted: Do not check spelling or grammar

Figure 5-21:          Overview of D-TAXI Operating Method .................................................................................... 80                      Formatted: Do not check spelling or grammar

Figure 5-22:          D-TAXI Departure Information Request Operating Method Diagram .......................................82                                          Formatted: Do not check spelling or grammar

Figure 5-23:          ATSU/ Controller Initiated D-TAXI Departure Information Operating Method Diagram ......... 83                                                    Formatted: Do not check spelling or grammar

Figure 5-24:          D-TAXI Start-Up Clearance Request Operating Method Diagram ............................................ 84                                       Formatted: Do not check spelling or grammar

Figure 5-25:          ATSU/ Controller Initiated D-TAXI Start-up Operating Method Diagram ................................ 86                                          Formatted: Do not check spelling or grammar

Figure 5-26:          D-TAXI Push-Back Clearance Request Operating Method Diagram ......................................... 87                                         Formatted: Do not check spelling or grammar

Figure 5-27:          Controller Initiated D-TAXI Push-Back Operating Method Diagram ........................................88                                        Formatted: Do not check spelling or grammar

Figure 5-28:          D-TAXI Taxi-Out Request Operating Method Diagram ............................................................ 89                                 Formatted: Do not check spelling or grammar

Figure 5-29:          Controller Initiated D-TAXI Taxi-Out Operating Method Diagram ..........................................90                                       Formatted: Do not check spelling or grammar

Figure 5-30:          D-TAXI Arrival Taxi Information Request Operating Method Diagram ...................................92                                           Formatted: Do not check spelling or grammar

Figure 5-31:          ATSU/Controller Initiated D-TAXI Arrival Taxi Information Operating Method Diagram ......93                                                      Formatted: Do not check spelling or grammar

Figure 5-32:          D-TAXI Taxi-In Request Operating Method Diagram ............................................................... 94                               Formatted: Do not check spelling or grammar

Figure 5-33:          Controller Initiated D-TAXI Taxi-In Operating Method Diagram ............................................. 95                                    Formatted: Do not check spelling or grammar

Figure 5-34:          D-TAXI Update Request Operating Method Diagram ............................................................... 96                                Formatted: Do not check spelling or grammar

Figure 5-35:          D-TAXI Taxi Update Clearance Operating Method Diagram .................................................... 97                                    Formatted: Do not check spelling or grammar




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                                             SPR Draft E (FAA Evaluation Release) 30 April 2009

1   INTRODUCTION
    Note: This is the first instantiation of this document used to provide the capability for users
    and providers to support validation activities associated with the data communications needs
    of future Air Traffic Management concepts e.g., Next Generation Air Transportation System
    (NextGen) and Single European Sky Air Traffic Management Research (SESAR) initiatives.
    This document will be updated as necessary from the validation activities conducted by the
    committee membership and others to be published in 2011.
    This version of the document is NOT intended for implementation and operational use until
    the validation activities are completed.
    This standard provides the operational, safety, and performance requirements (SPR) for the
    implementation of data communications services that support air traffic services (ATS). It is
    intended to support the communication element of the implementation of communication,
    navigation, and surveillance / air traffic management (CNS/ATM) systems in worldwide
    application.
    This document was developed in accordance with the criteria for SPR standards set forth in
    RTCA DO-264/EUROCAE ED-78A, “Guidelines for Approval of the Provision and Use of
    Air Traffic Services Supported by Data Communications.” In addition to the qualitative safety
    assessment methodology in RTCA DO-264/EUROCAE ED-78A, a quantitative safety
    assessment has been defined and performed. This document provides the minimum
    operational, safety, and performance requirements and allocations to the Air Traffic Service
    provider, Operator, Aircraft system and Air-Ground Communications Service Provider based
    on the results of a coordinated requirements determination process, which includes operational
    services and environment information, an operational safety assessment (OSA), and an
    operational performance assessment (OPA). A summary of the OSA and OPA approach is
    provided in Annex A and D respectively. As part of the coordinated requirements
    determination process, these requirements were validated based on operational experience,
    simulations and analyses. These requirements provide assurance that the elements of the
    CNS/ATM system, when operating together, will perform their intended function in an
    acceptably safe manner.
    Figure 1-1Figure 1-1 provides an overview of the CNS/ATM system and its elements. These
    elements comprise the operator provisions, the aircraft system, the air traffic service provider
    (ATSP) provisions, and air-ground communications service provisions (ACSP). Air-ground
    communications services may be provided by an ACSP or an ATSP can also provide this
    service itself.
    More than one ATSU may be involved in the provision of data communications services and
    may require interfacility communications between the involved ATSUs.
    In addition, flight information data may be exchanged between the sources, where the flight
    information data resides, and an ATSU.




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                                                       SPR Draft E (FAA Evaluation Release) 30 April 2009
       Operator

                                                   Procedures    Aircraft System
                                                     (Flight
                                                      Deck)         End System
                                                                     (Aircraft)
                                                                                        Data
                                                      Flight                        Communication
                                                                      HMI
                                                      crew



                                                                                      Air-Ground
                                                                                    Communications


                                                                                    Communication
       Air Traffic Service Provider                                                   Services

              Air Traffic Service Unit (ATSU) B

           Air Traffic Service Unit (ATSU) A
                                                                                   Ground-Ground
                  Procedures      ATSU System                                      Communications
                    (ATSU)
                                      End System                                                   Flight
                                        (ATSU)                Data                              Information
                                                          Communication                        Data Sources
                  Controller
                                      HMI                                            Interfacility
                                                                                   Communications




                               Figure 1-1:         Overview of the CNS/ATM System

1.1   Purpose
      This document defines and allocates the set of minimum requirements for the operational,
      safety, and performance aspects for implementations of data communications services
      supporting ATS. Allocation is done by this SPR standard to the necessary elements of the
      CNS/ATM system. This SPR standard is intended for use with interoperability requirements
      (INTEROP) standards, and the guidelines described in RTCA DO-264/EUROCAE ED-78A.
      Note: Based on RTCA DO-264/EUROCAE ED-78A, INTEROP and SPR standards provide
      recommendations intended for government organizations, conference of governments, or
      agencies having statutory jurisdiction over the use and provision of data communications
      services. These recommendations are for use by such government organizations to enunciate
      official policy related to such matters in aeronautical information publications (AIPs), notices
      to airmen (NOTAMs), airplane flight manuals (AFMs), and operator specifications.

1.2   Scope
      This document supports provision of data communications in all operational environments e.g.
      continental, oceanic, and surface in support of air traffic control & flight information services..
      Note 1: The document scope is limited to the requirements for operational data
      communications services relevant to the air traffic services. Assumptions for the environment
      and other ATS functions are stated when necessary to establish the operational requirements
      and/or the safety and performance requirements for the data communications services
      contained in this document.


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                                                   SPR Draft E (FAA Evaluation Release) 30 April 2009
          Note 2: This SPR standard is intended to provide the basis for demonstrating that an
          implemented system, considering its inherent design and technologies, can meet the relevant
          operational, safety, and performance requirements for the data communications services
          described in this document. It is not intended to limit the use of an implementation only to the
          data communications services and operational context defined herein. However, in cases
          where this SPR standard is intended to support additional or to define new data
          communications services, the operational, safety and performance requirements for such
          operational contexts and/or new data communications services will need to be established as
          a basis for approval qualification of the implemented systems.
          Note 3: Requirements related to securing data communications services that would provide
          for protection against malicious or intentional behavior causing harm are beyond the scope of
          this document.
          Note 4: Requirements related to the recording of data communications for accident/incident
          investigation are beyond the scope of this document.


1.3       Relationships to Other Documents
1.3.1     ICAO Material
          This SPR standard considers International Civil Aviation Organization (ICAO) material.
          Terminology used in this standard is consistent with ICAO use.
          Note: This SPR standard is intended to be operationally oriented and not based on any
          particular technology, when ICAO material refers to a specific technology; this standard only
          considers the operational intent.
          This SPR standard provides the results of operational assessments on data communications
          services used to support ATS. This standard includes the assessment of data communications
          services used in continental airspace. A mapping of the SPR data communications services
          supporting ATS is shown inError! Reference source not found.Erreur ! Source du renvoi
          introuvable. Error! Reference source not found..
1.3.2     Approval Material
          This SPR standard is intended to support approval of a CNS/ATM system element. It is used
          with INTEROP standards and, where appropriate, other SPR standards, as evidence of a
          coordinated requirements determination process, which is defined in RTCA DO-264/
          EUROCAE ED-78A. These standards provide the basis for qualifying the operational, safety,
          and performance aspects of an element of the CNS/ATM system. When qualifying, the
          selected INTEROP standards have to be shown to be compatible with the SPR standards.
          Note: Recognition of SPR and INTEROP standards and any unique characteristics or
          adaptation affecting operations, safety, performance, and interoperability for a specific ATS
          provision, aircraft type design, or operator’s operation can be found in the respective AIPs,
          NOTAMs, AFMs, and operator’s specifications.
1.3.2.1   Provisions for Requirements and Guidance Material Supporting Approvals
          This document uses the word “shall” to indicate a mandated criterion; i.e., compliance is
          mandatory and no alternative may be applied.
          Note: In an approval context, the “shalls” are considered a mandated criterion if the:



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                                                SPR Draft E (FAA Evaluation Release) 30 April 2009
         Applicant defines this standard, in conjunction with relevant INTEROP standards, and any
          adaptation (Refer to RTCA DO-264/EUROCAE ED78A, paragraph 1.3.3), as the approval
          basis, and
         Approval authority accepts this approval basis, which then defines the criteria for
          compliance.
        This document uses the word "should" to indicate that although the criterion is regarded as the
        preferred option, alternative criteria may be applied. In such cases, alternatives should be
        identified in appropriate approval plans and agreement sought from the approval authority.

1.4     Document Description

1.4.1   Document Organization
        Section 1: Introduction to the Data Communications SPR. Section 2: Description of the
        operational objectives for the data communications services in terms of the ATS objectives, as
        provided by ICAO Annex 11 and ATS functions related to implementing data
        communications services.
        Section 3: Overview of the environment and identification of conditions related to the
        provision and use of data communications services.
        Section 4: Context Management Application: DLIC OSD, and CM OSA and OPA results.
        Section Error! Reference source not found.5: Controller-Pilot Communication Application:
        OSD for ACM, ACL, AMC, DCL, and D-TAXI services, the CPDLC message set, and
        CPDLC OSA and OPA results.
        Section Error! Reference source not found.6: ADS-C (place holder)
        Section Error! Reference source not found.7: Flight Information Services Application:
        OSD for D-OTIS, and D-FIS OSA and OPA results.
        Annex A provides a summary of the approach used for the Operational Safety Assessment
        Annex B provides the detailed CPDLC OSA
        Annex C provides the detailed D-FIS OSA
        Annex D provides a summary of the approach used for the Operational Performance
        Assessment
        Annex E provides the detailed CM OPA
        Annex F provides the detailed CPDLC OPA
        Annex G provides the detailed D-FIS OPA
        Annex H provides the D-OTIS templates for ATIS, NOTAM, and VOLMET
        Appendix A provides a list of participants who contributed to the development of this SPR
        standard.
        Appendix B provides an improvement suggestion form.

1.4.2   Requirement and Recommendation Numbering Methodology
        Table 1-1Error! Reference source not found. identifies the labels used in this document.
                      Table 1-1:      Requirement and Recommendation Identifiers

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                                             SPR Draft E (FAA Evaluation Release) 30 April 2009
        Label                     Description
        DLIC-OR ##                DLIC service specific operational requirement
        DLIC-ORec ##              DLIC service specific operational recommendation
        CPC-OR ###                CPDLC application specific operational requirement
                                  (applies to all CPDLC services)
        CPC-ORec ##               CPDLC application specific operational recommendation
                                  (applies to all CPDLC services).
        ACM-OR ###                ACM service specific operational requirement
        ACM-ORec ##               ACM service specific operational recommendation
        ACL-OR ###                ACL service specific operational requirement
        ACL-ORec ##               ACL service specific operational recommendation
        AMC-OR ###                AMC service specific operational requirement
        AMC-ORec ##               AMC service specific operational recommendation
        DCL-OR ###                DCL service specific operational requirement
        DCL-ORec ##               DCL service specific operational recommendation
        DTAXI-OR ###              DTAXI service specific operational requirement
        DTAXI-ORec ##             DTAXI service specific operational recommendation
        DOTIS-OR ###              DOTIS service specific operational requirement
        DOTIS-ORec ##             DOTIS service specific operational recommendation
        4DTRAD-OR ###             4DTRAD service specific operational requirement
        4DTRAD-ORec ##            4DTRAD service specific operational recommendation
        FLIPINT-OR ###            FLIPINT service specific operational requirement
        FLIPINT-ORec ##           FLIPINT service specific operational recommendation
        SR-CM--##                 Safety Requirements for CM
        PR-CM--##                 Performance Requirements for CM
        SR-CPDLC--##              Safety Requirements for CPDCL
        PR-CPDLC--##              Performance Requirements for CPDCL
        SR-ADS--##                Safety Requirements for ADS-C
        PR-ADS--##                Performance Requirements for ADS-C
        SR-DOTIS--##              Safety Requirements for D-OTIS
        PR-DOTIS--##              Performance Requirements for D-OTIS



1.4.3   Acronyms and Glossary of Terms
        The following acronyms and terms are used in this document. When the terminology is
        common, the terminology used in this document is consistent with the terminology of RTCA
        DO-264 / EUROCAE ED-78A.
        ACRONYMS
                   Acronym        Description
                   4D             Four Dimensional
                   4DTRAD         4D Trajectory Data Link
                   ACL            ATC Clearance (service)
                   ACM            ATC Communication Management (service)
                   ACSP           Air-Ground Communication Service Provider
                   ADS-C          Automatic Dependent Surveillance - Contract
                   AFM            Aircraft Flight Manual
                   AIB            Airport Information Bulletin
                   AIP            Aeronautical Information Publication

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                         SPR Draft E (FAA Evaluation Release) 30 April 2009
    Acronym   Description
    AIP       Aeronautical Information Publication
    AMC       ATC Microphone Check (service)
    AOBT      Actual Off Block Time
    AOC       Airline Operation Center
    AOR       Area of Responsibility
    ASOR      Allocation of Safety Objectives and Requirements                Comment [JH1]: Check if used
    ATC       Air Traffic Control
    ATFCM     Air Traffic Flow and Capacity Management
    ATIS      Automatic Terminal Information Service
    ATM       Air Traffic Management
    ATS       Air Traffic Services
    ATSP      Air Traffic Service Provider
    ATSU      Air Traffic Service Unit
    C-ATSU    Current Air Traffic Services Unit
    CDA       Current Data Authority
    CM        Context Management
    CMS       Contact Monitor Surveillance
    CNS/ATM   Communication, Navigation, and Surveillance/Air
              Traffic Management
    COP       Coordination Point
    CPDLC     Controller Pilot Data Link Communication
    CTO       Controlled Time Over
    D-ATIS    Data link Automatic Terminal Information Service
    D-ATSU    Downstream ATSU
    D-OTIS    Data link Operational Terminal Information Service
    D-TAXI    Data link Taxi Service
    DLIC      Data Link Initiation Capability
    DM        Downlink Message
    ENR       Enroute                                                         Comment [JH2]: Should only use ER check
    EOBT      Estimated Off Block Time
    EPP       Extended Projected Profile
    ER        En-Route
    ETA       Estimated Time of Arrival
    ETD       Estimated Time of Departure
    FIB       In-Flight Information Bulletin
    FIS       Flight Information Service
    FL        Flight Level
    FMS       Flight Management System
    FOM       Figure Of Merit
    FPL       Flight Plan (as filed and received by the ground
              system)                                                         Comment [JH3]: Check on parens
    HIWAS     Hazardous Inflight Weather Advisory Service
    HMI       Human Machine Interface
    IAF       Initial Approach Fix
    IATA      International Air Transport Association
    ICAO      International Civil Aviation Organization
    INTEROP   Interoperability Requirement Standard
    IRA5      International Reference Alphabet 5 (or IA5)
    LACK      Logical Acknowledgement
    LOF       Logon Forward Message

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                          SPR Draft E (FAA Evaluation Release) 30 April 2009
    Acronym    Description
    LOA        Letter of Agreement
    METAR      Aviation Routine Weather Report Service
    MONA       ATC Monitoring Aids
    MSSR       Monopulse Secondary Surveillance Radar
    MTCD       Medium Term Conflict Detection
    NA         Not Applicable
    NDA        Next Data Authority
    NOTAM      Notice to Airmen
    OH         Operational Hazard
    OHA        Operational Hazard Assessment                                   Comment [JH4]: Check if these 2 used
    OLDI       On-line Data Interchange
    OPA        Operational Performance Assessment
    OR         Operational Requirement
    OSA        Operational Safety Assessment
    OSD        Operational Service Description
    OTIS       Operational Terminal Information Service
    PANS       Procedures for Air Navigation Services
    PIAC       Peak Instantaneous Aircraft Count
    PIB        Pre-Flight Information Bulletin
    PIREP      Pilot Report
    PSR        Primary Surveillance Radar
    R-ATSU     Receiving Air Traffic Service Unit
    RBT        Reference Business Trajectory
    RCP        Required Communication Performance
    RCTP       Required Communication Technical Performance
    RNAV       Area Navigation
    R-Sector   Receiving Sector
    RTA        Required Time of Arrival
    RVR        Runway Visual range
    SID        Standard Instrument Departure
    SIGMET     Significant Meteorological Forecast
    SMM        System Management Message
    SNOWTAM    Snow Warning to Airmen
    SO         Safety Objective
    SPECI      Aerodrome/Aviation Special Meteorological Report
    SPR        Safety and Performance Requirements
    SR         Safety Requirement
    SSR        Secondary Surveillance Radar
    ST         Safety Target
    STAR       Standard Arrival Route
    STCA       Short Term Conflict Alert
    T-ATSU     Transferring Air Traffic Service Unit
    TAF        Terminal Aerodrome Forecasts
    T/D        Touchdown
    TMA        Terminal Control Area
    TOD        Top of Descent
    TRA        Temporary Restricted Area
    TSA        Temporary Segregated Area
    T-Sector   Transferring sector
    UM         Uplink Message
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                                      SPR Draft E (FAA Evaluation Release) 30 April 2009
            Acronym        Description
            VCI            Voice Contact Instruction
            VHF            Very High Frequency
            WILCO          Will Comply
            WMO            World Meteorological Organisation


    GLOSSARY OF TERMS


        Term                       Definition
        4DT                        4D Trajectory

                                   A set of consecutive segments linking waypoints and/or
                                   points computed by the FMS (airborne) or by TP (ground) to
                                   build vertical profile and lateral transitions; each point
                                   defined by a longitude, a latitude, a level and a time

                                   (REF: SESAR Operational Scenarios and Explanations
                                   Network Airline Scheduled Operation, V0.6)

                                   Four-Dimensional Trajectory:
                                   Represents the “centerline” of a path plus the positioning
                                   uncertainty, including waypoint. Positioning uncertainty
                                   includes lateral, longitudinal, and vertical positioning
                                   uncertainty. Some waypoints within a 4DT may be defined
                                   with controlled times of arrival (CTAs), which constrains the
                                   uncertainty for planning purposes. The required level of
                                   specificity of the 4DT will depend on the operating
                                   environment in which the flight will be flown. Associated
                                   with a 4DT is the separation zone around an aircraft and the
                                   aircraft intent information, which provides near-term
                                   information on the expected flight path.

                                   (REF: NextGen CONOPS)

                                   Note: The 4DT is downlinked from aircraft and additional
                                   information may also be included with the downlinked
                                   trajectory, earliest/latest ETAs at specific waypoint, target
                                   speeds, etc. See Appendix C for a description on the data
                                   items to be contained in the 4DT.
        4DTRAD Message             Clearance or expect messages uplinked using 4DTRAD
                                   service
        4DTRAD Service Area
                                   A volume of airspace in which the 4DTRAD service is used.
                                   It may begin shortly after an aircraft isairborne, or at a
                                   waypoint along the route of the aircraft.
                                   Where data link services are available during surface
                                   operations the aircraft may download the intended trajectory
                                   on ground. However this trajectory will be only used for
                                   ATFCM purposes.                                                 Comment [JH5]: This is not part of a defintion
        4DTRAD Service Provider    The C-ATSU and D-ATSUs for a flight plus any relevant
                                   flow control units, and the brokering function in 4DTRAD
                                   service area.
        A

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                                        SPR Draft E (FAA Evaluation Release) 30 April 2009
    Term                              Definition
    AAMAN                             Advanced AMAN is an ATM tool that determines the optimal
                                      arrival sequence times for an aerodrome and/or possibly at
                                      other common route fixes (e.g., IAF) and proposes trajectory
                                      solutions.
    Aerodrome                         A defined area on land or water (including any buildings,
                                      installations and equipment) intended to be used either wholly
                                      or in part for the arrival, departure and surface movement of
                                      an aircraft. [ICAO]
    Air System                        Air System refers to aircraft that is under the 4DTRAD
                                      service.                                                              Comment [JH6]: Check if this is used or
    Application process               A set of resources, including processing resources, within a          needed
                                      real open system which may be used to perform a particular
                                      information processing activity.
    Aircraft address                  A unique combination of 24 bits available for assignment to
                                      an aircraft for the purpose of air-ground communications,
                                      navigation and surveillance.
    Aircraft flight identification    A group of letters, figures or a combination thereof, which is
                                      either identical to, or the coded equivalent of the aircraft call
                                      sign to be used in air-ground communications, and which is
                                      used to identify the aircraft in ground-ground ATS
                                      communication. Per ICAO Document 9880 Sub-Volume 1
    Aircraft identification           A group of letters, figures or a combination thereof, which is
                                      either identical to, or the coded equivalent of the aircraft call
                                      sign to be used in air-ground communications, and which is
                                      used to identify the aircraft in ground-ground ATS
                                      communication. Per ICAO Doc 4444-ATM/501 Chapter 1.
    Aircraft System                   The aircraft system as referred to in this document includes
                                      all sub-systems associated with data communications on an
                                      aircraft.
    Air Traffic Control Clearance     Authorization for an aircraft to proceed under conditions
                                      specified by an air traffic control unit.
                                      Note 1: For convenience, the term “air traffic control
                                      clearance” is frequently abbreviated to “clearance.”
                                      Note 2: The abbreviated term “clearance” may be prefixed
                                      by the words start-up”, “push-back”, “taxi”, “take-off”,
                                      “departure”, “en-route”, “approach” or “landing” to
                                      indicate the particular portion of flight to which the air traffic
                                      control clearance relates. [ICAO]
    Air traffic control instruction   Directives issued by air traffic control for the purpose of
                                      requiring a pilot to take a specific action. [ICAO]
    Air traffic control service       A service provided for the purpose of:
                                                 a) Preventing collisions between aircraft, and on
                                                     the manoeuvring area between aircraft and
                                                     obstructions; and
                                                 b) expediting and maintaining an orderly flow of
                                                     air traffic [ICAO]
    Air traffic management            The aggregation of the airborne functions and ground-based
                                      functions (air traffic services, airspace management and air
                                      traffic flow management) required to ensure the safe and
                                      efficient movement of aircraft during all phases of operations.
    Air traffic service               A generic term meaning variously, flight information service,
                                      alerting service, air traffic advisory service, air traffic control
                                      service (area control service, approach control service or
                                      aerodrome control service). [ICAO]

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                                      SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                           Definition
     Air traffic service function   An application of air traffic services or portions thereof that
                                    satisfies an operational need.
     Air Traffic Services Unit      A generic term meaning variously, ATC unit, flight
     (ATSU)                         information center, or ATC service area control services
                                    reporting office. In this document, ATSU refers to both
                                    human operators (e.g., Controllers) and automated systems
                                    (e.g., data processing systems) at an ATSU, unless
                                    specifically stated otherwise.
     AMAN                           Arrival Manager: An ATM tool that determines the optimal
                                    arrival sequence times for an aerodrome and/or possibly at
                                    other common route fixes (e.g., IAF)

                                    (REF: SESAR Operational Scenarios and Explanations
                                    Network Airline Scheduled Operation, V0.6)
     Approval                       A document by which an authorized body, acting within a
                                    legislative framework, gives formal recognition that a
                                    product, process or service/operation conforms to applicable
                                    requirements.
     Approval Process               A process by which an authorized body, acting within a
                                    legislative framework, gives formal recognition that a
                                    product, process or service/operation conforms to applicable
                                    regulatory requirements.
     Area Navigation (RNAV)         A method of navigation which permits aircraft operation on
                                    any desired flight path within the coverage of station-
                                    referenced navigation aids or within the limits of capability of
                                    self-contained aids, or a combination of these.
     ATS provider                   An appropriate ATS authority in a given airspace.
     ATSP system                    The total ATS provider system including the technical system
                                    and operational procedures.
     Automatic terminal             The automatic provision of current, routine information to
     information service            arriving and departing aircraft throughout 24 hours or a
                                    specified portion thereof:
                                    Data link-automatic terminal information service (D-ATIS).
                                    The provision of ATIS via data communications.
                                    Voice-automatic terminal information service (Voice-ATIS).
                                    The provision of ATIS by means of continuous and repetitive
                                    voice broadcasts.
                                    [ICAO]
     B
     Baseline ADS-C report          Used in event ADS-C contracts, when the sending of an
                                    ADS-C event report is dependent on comparing a given ADS-
                                    C parameter with a reference parameter. The ADS-C
                                    baseline report establishes the reference parameter value(s).
                                    Sent in response to receipt of an ADS-C event contract
                                    requiring a baseline report; not upon occurrence of the
                                    specified event.
     Brokering function             A function of the 4DTRAD ground provider responsible for
                                    collating the input from all ATSUs and any flow control
                                    entities interested in the flight and deciding on the best
                                    constraints to be put on the aircraft
                                    When there more than requests for CTO/RTA constraint for
                                    an aircraft, the brokering function will use the information
                                    from the aircraft’s trajectory (including 5 selected
                                    minimum/max imum ETAs) to decide on the best CTO/RTA.

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     Term                     Definition
     C
     Clearance                See air traffic control clearance
     Communication Services   The delivery of data messages and/or voice between end
                              systems.
     Clearance limit          The point to which an aircraft is granted an air traffic control
                              clearance.
                              A clearance limit is described by specifying the name of the
                              appropriate significant point, aerodrome, or controlled
                              airspace boundary.
                              When prior coordination has been effected with units under
                              whose control the aircraft will subsequently come, or if there
                              is reasonable assurance that it can be effected a reasonable
                              time prior to their assumption of control, the clearance limit
                              shall be the destination aerodrome or, if not practicable, an
                              appropriate intermediate point, and coordination shall be
                              expedited so that a clearance to the destination aerodrome
                              may be issued as soon as possible.
                              If an aircraft has been cleared to an intermediate point in
                              adjacent controlled airspace, the appropriate ATC unit will
                              then be responsible for issuing, as soon as practicable, an
                              amended clearance to the destination aerodrome.                    Comment [JH7]: This part is not a definition
                              (REF: ICAO PANS-ATM edition 15)
     Complexity Management    The management of overall ATC workload primarily based
                              on trajectory predictions, to maximize the network capacity
                              and optimize traffic flows.
                              Complexity management processes will trigger actions prior
                              to the arrival of the aircraft in the subject airspace such as:
                              dynamic airspace management, Trajectory modifications,
                              demand and capacity balance or de-complexion solutions,
                              transition to structured airspace with fixed routes, dynamic
                              constraint management.                                             Comment [JH8]: This part is not a definition
                              (REF: Complexity Management Concept v1.1
     Computed Waypoint        Waypoints that are defined by reaching an altitude or flying
                              on a heading, and are thus not fixed.
                              (REF: ICAO Doc 9694 PART III, draft 12)
                              Computed waypoints are computed by the FMS and may also
                              include for example, top-of-descent or climb points.
     Common Trajectory        A representation of the aircraft’s trajectory in the ground
                              system, as derived eitherfrom the aircraft trajectory downlink
                              or generated by the ground system.




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                                    SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                         Definition
     Constraint                   Cleared Constraints: Any cleared limitation on the
                                  aircraft’s cleared route. This term is used generically to refer
                                  to time, speed or level constraints, issued to the aircraft that
                                  restrict the options of the flight crew or FMS on how the
                                  aircraft is to be flown. This data is issued as a clearance.

                                  Expected Constraints: Any limitation on the aircraft’s
                                  expected route. This term is used generically to refer to time,
                                  speed or level constraints, issued to the aircraft that restrict
                                  the options of the flight crew or FMS on how the aircraft is to
                                  be flown. This data are issued as expected clearances.

                                  Metering Constraints: A time or speed constraint on an
                                  agreed trajectory to control the time a flight crosses a point.

                                  Note: 4DTRAD excludes the definition or specification of
                                  the aircraft’s performance needed in relation to constraints.
                                  4DTRAD service is used to uplink constraint values and to
                                  monitor the conformance of the aircraft towards that value
                                  (e.g. whether aircraft will meet assigned CTO with expected
                                  accuracy)                                                          Comment [JH9]: This part is not definition
     Continuity                   The probability that a transaction completes within the
                                  expiration time
     Controlled Time Over (CTO)   An ATM imposed time constraint over a point which could
                                  be an enroute point or the arrival point at destination.
                                  (REF: SESAR Operational Scenarios and Explanations
                                  Network Airline Scheduled Operation, V0.6)

                                  The assignment and acceptance of an entry/use time for a
                                  specific NAS resource. Examples include point-in-space
                                  metering, time to be at a runway, or taxi waypoints.
                                  (REF: NextGen CONOPS)

                                  In 4DTRAD this term is only used to describe constraints
                                  originating from ATC, and only when discussing proposed
                                  time constraints that have not been sent to the aircraft. A
                                  CTO may be specified as AT, At/Before, or At/After, and can
                                  include a specification of the allowable tolerance in meeting
                                  the constraint

                                  As NexGen uses the terminology CTO and SESAR uses both
                                  CTO and CTO this document refers to both as CTO.                   Comment [JH10]: We have to get rid of all
     Controller Pilot Data Link   Application that allows data communications between                SESAT/NexGen reference and specify the
                                                                                                     definition as they apply to this document –
     Communication                Controllers and pilots together with end-to-end protection of
                                                                                                     applies though out table
                                  message integrity by an application level integrity check that
                                  also provides assurance of correct delivery.
     Current ATSU                 The ATSU that can exchange ATC communications
                                  messages with an aircraft




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                                    SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                         Definition
     Current Controller           The controller responsible for the sector or that has the
                                  current control authority over the aircraft.
                                  Note: Automation (e.g. Multi sector planner) or authorized
                                  personnel which conducts downstream coordination is a
                                  normal ATC function for insuring that
                                  notification/coordination has been conducted for the relevant
                                  elements of the flights trajectory (although the flight may not
                                  yet be in the next controllers area of responsibility). Local
                                  implementation will decide on detailed task allocation.            Comment [JH11]: The note is not a definition
     D
     Development assurance        Planned and systematic actions performed to minimize
                                  generic errors during development and implementation, and
                                  provide confidence that the system is suitable for its intended
                                  use. [RTCA DO-264/ EUROCAE ED-78A]
     E
     Estimated off-block time     The estimated time at which the aircraft will commence
     (EOBT)                       movement associated with departure. [ICAO]
     Enabled                      In the context of CPDLC, refers to a connection, which has
                                  been activated for operational exchanges. To become
                                  enabled, a CPDLC connection must have CDA status in
                                  accordance with ICAO Document 9880 and must have
                                  satisfied specific additional requirements specified in this
                                  document.
     F
     Failure of Integrity         The probability that a transaction completes with one or
                                  more undetected errors
     Flight information service   A service provided for the purpose of giving advice and
                                  information useful for the safe and efficient conduct of
                                  flights. [ICAO].
     Flight plan                  Specified information provided to air traffic services units,
                                  relative to an intended flight or portion of a flight of an
                                  aircraft. [ICAO]
                                  A flight plan can take several forms, such as:
                                  Current flight plan (CPL). The flight plan, including changes,
                                  if any, brought about by subsequent clearances.
                                  Note: When the word “message” is used as a suffix to this
                                  term, it denotes the content and format of the current flight
                                  plan data sent from one unit to another.
                                  Filed flight plan (FPL). The flight plan as filed with an ATS
                                  unit by the pilot or a designated representative, without any
                                  subsequent changes.
                                  Note: When the word “message” is used as a suffix to this
                                  term, it denotes the content and format of the filed flight plan
                                  data as transmitted.
                                  Repetitive flight plan (RPL). A flight plan related to a series
                                  of frequently recurring, regularly operated individual flights
                                  with identical basic features, submitted by an operator for
                                  retention and repetitive use by ATS units.
                                  Aircraft flight plan. The flight plan used by the flight crew.
                                  The sequence of legs and associated constraints that define
                                  the expected 3D or 4D trajectory of the aircraft from takeoff
                                  to landing.
     I


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                                  SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                       Definition
     Initiator                  A human and/or machine party that initiates a transaction.
                                Note: In some cases a human and a machine may both
                                contribute to the initiation of a message. For example, a
                                human may create a route clearance message and a machine
                                may conduct a conflict probe check on that message and/or
                                append an altimeter setting before it is released for protocol
                                encoding and onward transmission.
     L
     Lateral Waypoints          Fixed waypoints used to define the route of flight (including
                                both en-route waypoints and those contained in terminal area
                                procedures);

                                Computed waypoints (e.g., waypoints that are defined by
                                reaching an altitude or flying on a heading, and are thus not
                                fixed). These are usually contained in terminal area
                                procedures;

                                Wherever a lateral (parallel) offset will be initiated or
                                reached;

                                Wherever the return from a lateral (parallel) offset will be
                                initiated or completed.

                                (REF: ICAO Doc 9694 PART III draft 12)
     N
     Normal means of            Communication capability that is required for operational
     communication              approval.
     O
     Open Loop Clearance        An open-loop clearance is an ATC clearance that does not
                                include a specified or implied point where the restriction on
                                the trajectory ends.

                                Most tactical clearances are open loop clearances; they
                                include heading (including track offset), level, and speed
                                restrictions and rates of climb or descent. Open loop
                                clearances are cancelled (closed) by a further instruction from
                                the controller that defines how the flight should revert to the
                                Reference Business Trajectory.
                                (REF: SESAR CONOPS                                                Comment [JH12]: I think the term reference
     Open Message               A (CPDLC) message requiring a response for which the              business trajectory is too restrictive here
                                closure response has not yet been received.
     Operational Requirement    An Operational requirement is a requirement which is
                                imposed on the system/user to meet the operational objective.
                                Operational requirements may take various forms, including
                                organizational, operational, procedural, functional,
                                performance, and interoperability requirements.
     Operator                   A person, organization or enterprise engaged in or offering to
                                engage in an aircraft operation.
     P
     Planning Controller (PC)   The controller responsible for non-radar related tasks.

                                The planning controller manages sector traffic entry and exit
                                co-ordination and other tasks delegated by the tactical
                                controller.

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                                       SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                            Definition
     Predicted Trajectory            What the aircraft is predicted to fly.

                                     Note: The airborne predicted trajectory is continually
                                     computed/updated on-board (in aircraft fitted with FMS or
                                     similar equipment)
                                     (REF: SESAR CONOPS)
     Q
     Queue management                The tactical establishment and maintenance of a safe, orderly
                                     and efficient flow of traffic.

                                     Queue management includes the handling of queues, both in
                                     the air and on the ground. It operates on individual flights
                                     and is closely related to, and sometimes indistinguishable
                                     from, the Separation Provision process. Queue management          Comment [JH13]: See if this needs to be
                                     is used to facilitate the highest achievable capacity of the      defined
                                     ATM System and to manage delays in a fuel-efficient and
                                     environmentally acceptable manner.
                                     (REF: SESAR CONOPS)
     R
     Receiving ATS Unit (R-          The ATS unit that will next assume control responsibility of a
     ATSU)                           flight.
     Receiving sector                Within a given ATSU, the next sector that the aircraft will
                                     enter.
     Reference Business Trajectory   The reference business trajectory (RBT) is the trajectory,
                                     which the airspace user agrees to fly, and the ANSP and
                                     airport agrees to facilitate. The RBT becomes instantiated
                                     before the first ATC clearance is requested or issued but it
                                     does not constitute a clearance to proceed.

                                     Most times indicated in the RBT are estimates, however some
                                     may be target times to facilitate planning and some of them
                                     may be cleared constraints to assist in particular in queue
                                     management when appropriate.
                                     (REF: SESAR CONOPS)
     Required Communication          Required Communication Performance is a statement of the
     Performance (RCP)               performance requirements for operational communication in
                                     support of specific ATS functions.
     RCP Type                        A label (e.g., RCP240) that represents the values assigned to
                                     RCP parameters for communication transaction time,
                                     continuity, availability and integrity.
     Required Communication          Required Communication Technical Performance is the set of
     Technical Performance           performance requirements bearing on the technical
     (RCTP)                          communication ATM/CNS elements.
     Required Time of Arrival        Required Time of Arrival FMS RTA function.                        Comment [JH14]: Not a definition
     (RTA)
                                     (REF: SESAR Operational Scenarios and Explanations
                                     Network Airline Scheduled Operation, V0.6)
     Responder                       A human and/or machine party that is the target of a
                                     transaction and is required to provide an operational response.
     Route                           A 3D path through space with no time component. Unlike
                                     corridors,Aircraft can cross routes as operational need
                                     requires, with proper separation provided to all aircraft.
                                     (REF: NextGen CONOPS)
     S

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                                  SPR Draft E (FAA Evaluation Release) 30 April 2009
     Term                       Definition
     Safety Objective           The safety objective defines the maximum frequency or
                                probability at which an Operational Hazard can be tolerated
                                to occur.
     Safety Requirement         A safety requirement is a requirement which is imposed on
                                the system to meet the safety objective. Safety requirements
                                may take various forms, including organizational, operational,
                                procedural, functional, performance, and interoperability
                                requirements or environmental characteristics.
     Safety Target              The safety target is maximum frequency or probability at
                                which an Operational Effect for a given Severity Class can be
                                tolerated to occur.
     Speed                      Refers to aircraft Indicated Air Speed or Mach number.               Comment [JH15]: Check if this is needed, the
     Speed Schedule             The calculated or manually entered speeds the FMS is                 speed is defined more broadly in both CPDLC
                                                                                                     and ADS
                                scheduled to use for the climb, cruise and descent when
                                considering schedule requirements, ATC clearance, fuel, and
                                operating costs. Using the Cost Index and other aircraft             Comment [JH16]: Does this need a definition
                                parameters an economical speed (calibrated airspeed [CAS]
                                and/or mach) is computed and scheduled for use during each
                                of the flight phases. The speed schedule may be reported in
                                ADS-C as one or several speed values indicated as CAS
                                and/or Mach depending on the current flight phase:
                                Climb speed ;
                                Initial cruise speed (at top of climb (TOC);
                                Last cruise speed (at top of descent (TOD);
                                Descent speed.
                                The waypoint estimated speed in the trajectory data are
                                computed in compliance with these intended speeds.
                                 (REF: ICAO Doc 9694 PART III, draft 12)
     Supplemental Means of      Communication capability that is not required for the
     Communication              intended operation, but if available can be used instead of the
                                normal means in accordance with operational approval.
     Synchronised Trajectory    The result of a data exchange between air and ground systems
                                where the trajectory of the aircraft is consistent with the
                                trajectory of the ground system. The synchronised trajectory
                                includes both portions that are cleared as well as portions not
                                cleared or beyond any clearance limit imposed by ATC.

                                The synchronised trajectory is essentially equivalent to the
                                Reference business Trajectory. however it refers more to the
                                result of a tactical synchronization process followed after
                                departure rather than a strategic layered planning process
                                undertaken prior to departure.                                       Comment [JH17]: Is this part needed
     T
     Tactical Controller (TC)   The tactical controller has final responsibility in co-ordinating
                                traffic in a sector. The tactical controlleror Executive
                                Controller (EXC), in the traditional controller team, is
                                responsible for the tasks associated with traffic co-ordination
                                and management in a sector.

                                 The tactical controller role refers to the responsibility defined
                                for the TC for the purpose of co-ordinating and managing
                                traffic in a sector.
                                (Ref. FASTI ATC Manual - Guidelines for FASTI Tools
                                Implementation edition 1)


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                                                       SPR Draft E (FAA Evaluation Release) 30 April 2009
                     Term                           Definition
                     Transferring ATS Unit (T-      The ATS unit that is transferring control responsibility of a
                     ATSU)                          flight.
                     Transferring sector            Within ATS unit, the sector that is transferring control
                                                    responsibility of a flight.
                     Transfer instruction           Voice or data link instruction to change frequency (immediate
                                                    or deferred)
                     What-if function               A ground system function that provides the C\controller with
                                                    capability to analyse a 2D route change proposal/level change
                                                    and in some cases may include time or speed constraint
                                                    proposal, prior to issuing. The elements that the controller
                                                    requires to perform the analysis are regionally specific but
                                                    may include tactical ATFCM and workload/complexity.

                                                    Note: A regional implementer may choose to also
                                                    incorporate a separation assessment however this is outside
                                                    the scope of 4DTRAD.                                               Comment [JH18]: Should it be outside the
                                                                                                                       scope of the document
                                                    What-if probing refers to the action by a controller whereby a
                                                    trajectory is edited (i.e., becomes a tentative trajectory) and
                                                    prior to updating the system this edited trajectory is probed to
                                                    ascertain if it is conflict free or otherwise. The ‘probing’
                                                    process is a function of trajectory comparison to detect
                                                    uncertainty overlap of trajectories based on offline predefined
                                                    parameters set in the system for specified time horizons.

                                                    (Ref. FASTI ATC Manual - Guidelines for FASTI Tools
                                                    Implementation edition 1)



1.5           References
      The references cited in this document are listed below:
          1. RTCA DO-264/EUROCAE ED-78A guidelines;
          2. EUROCONTROL Safety Regulatory Requirement (ESARR4) – Risk Assessment and
             Mitigation in ATM – Ed 1.0 – April 2001;
          3. ED-125: Process for Specifying Risk Classification Scheme and Deriving Safety Objectives in
             ATM “in compliance” with ESARR 4;
          4. FAA Safety Management System (SMS), Version 2.1;
          5. FAA Safety Requirements Risk Management Guidance on System Acquisition (SRMGSA),
             Version 1.4;
          6. FAA System Engineering Manual (SEM), Version 3.1
          7. DO290/ED120, Safety and Performance Requirements Standard for Air Traffic Data Link
             Services in Continental Airspace, May 2004 including Change 1 (April 2007) and Change 2
             (October 2007)
          8. DO306/ED122, Safety and Performance Requirements Standard for Air Traffic Data Link
             Services in Oceanic and Remote Airspaces, December 2007
          9. ICAO Manual of Air Traffic Services Data Link Applications (Doc 9694);


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                                                SPR Draft E (FAA Evaluation Release) 30 April 2009
     10. ICAO Manual of Technical Provisions for the Aeronautical Telecommunication Network
         (ATN) (ICAO Document 9705) Edition 2;
     11. ICAO Manual of Technical Provisions for the Aeronautical Telecommunication Network
         (ATN) using ISO/OSI protocols (ICAO Document 9880) Edition 1;
     12. Document XXX – Technical Provisions for PM-ADS and PM-FIS
     13. ICAO Annex 2, Rules of the Air to the Convention on International Civil Aviation;
     14. ICAO 4444-ATM/501, Procedures for Air Navigation Services - Air Traffic Management;
         15th Edition.
     15. ICAO Annex 10 -        Aeronautical Telecommunications, Volume II – Communications
         Procedures;
     16. ICAO Doc 7910/94 – ICAO Location Indicators;
     17. Amendment 72 to ICAO Annex 3 – Meteorological Service for International Air Navigation;
     18. ICAO Annex 11 – 13th Edition – Air Traffic Services – Chapter 4: Flight Information Service;
     19. ICAO Document 8643 – Aircraft Type Register
     20. ICAO Doc 8126 Aeronautical Information Services Manual

     21. ICAO Doc 8400 ICAO Abbreviations and Codes.
     22. ICAO Annex 6, Operation of Aircraft, Part I - International Commercial Air Transport –
         Aeroplane.

     23. ICAO Doc. 8168, OPS - Aircraft Operations Volume I (Flight Procedures)
     24. ICAO Doc. 9694, Manual of Air Traffic Services Data Link Applications
                                                                            st
     25. ICAO Doc 9869, Manual on Required Communiction Performance; 1 edition - 2006




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                                                 SPR Draft E (FAA Evaluation Release) 30 April 2009

2       ATS FUNCTIONS
        Figure 2-1Figure 2-1 Error! Reference source not found.Error! Reference source not
        found.Error! Reference source not found.Error! Reference source not found.Error!
        Reference source not found.Error! Reference source not found.provides an overview of
        the scope of the ATS functions and data communications services as it relates to the air traffic
        services and communication, surveillance, and navigation components.




        Figure 2-1:     Notional relationship of ATS, ATS Functions, Communication,
                        Navigation and Surveillance Capabilities, and Data Communications
                        Services

2.1.1   ATS Functions Supported by Data Communications
        The ATS functions supported by advanced data communications are:
                Function One (F1): the controller to obtain information on the current position, actual
                progress, and intended movement of each aircraft;
                Function Two (F2): the controller to issue clearances and information;
                Function Three (F3): the flight crew to obtain clearances and instructions; and
                Function Four (F4): the flight crew to obtain flight information.
        The functions are supported by the operational data communications services for both
        supplemental and normal means of communication.
        Note 1: These data communications services provide communication and surveillance
        capabilities related to expediting and maintaining an orderly flow of air traffic; maintaining
        the separation standards; and handling limited non routine situations. They are not intended
        to be used by the controller to intervene for preventing collisions.
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                                               SPR Draft E (FAA Evaluation Release) 30 April 2009
        Note 2: The functional, safety and performance requirements of the data communications
        services do not replace the voice communication equipment requirements of ICAO Annex 6 or
        State regulatory requirements for operational communication and surveillance capabilities.

2.1.2   Data Communications Operational Capabilities Services
        This document includes the definition of data communications services, the environmental
        conditions relevant to their implementation, and their operational, safety and performance
        requirements. The ICAO data link applications and services supporting the ATS functions
        are:
        a) Context Management (CM) Application:
           1) Data Link Initiation Capability (DLIC),
        b) Controller-Pilot Communication (CPDLC) Application:
           1) ATC Communication Management (ACM),
           2) ATC Clearance (ACL),
           3) ATC Microphone Check (AMC),
           4) Departure Clearance (DCL), and
           5) Data Link Taxi (D-TAXI).
        c) Automatic Dependent Surveillance (ADS) Application:
           1) Flight Path Intent (FLIPINT).
        d) Flight Information Services (FIS) Application:
           1) Data Link Operational Terminal Information Service (D-OTIS).
        e) Combined Applications:
           1) In-Trail procedure (ITP).
           2) Four Dimensional Trajectory Data Link (4D-TRAD).
        Data communications services provide communication and/or surveillance services that
        support the ATS functions in the manner of Supplemental or Normal communications.
           a) Supplemental communications, i.e., use is not required by the ATS function it
              supports. Supplemental means are characterized as follows:
               1) Data communications used for situations where the delay or loss of data
                  communications messages has no effect to the safety of operations and only
                  insignificant effect to operations.
               2) Data communications is not required to achieve the ATS function since ATC
                  voice can exclusively support the ATS function, i.e., use of ATC voice or data
                  communications is at the discretion of the pilot/controller and provides an
                  equivalent level of service.
               3) When data communications can no longer be provided, procedures are established
                  and in place on the aircraft and ground to sustain operations by ATC voice
                  communications within acceptable time limits and without degradation to safety
                  during the transition.



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                                             SPR Draft E (FAA Evaluation Release) 30 April 2009
             4) Data communications provide sufficient integrity to avoid the need for procedural
                mitigation of anomalous behavior of the system (e.g., voice read-back of the data
                message).
         b) Normal communications, i.e. required by the ATS function. Normal means are
            characterized as follows:
             1) Qualified to the operational, safety, and performance requirements required for
                supporting the ATS function.
             2) When data communications can no longer be provided, procedures are established
                and in place on the aircraft and ground to transition to a degraded operation by
                ATC voice communications within acceptable time limits and without
                degradation to safety during the transition.
             3) Approved for use.

2.2   Data Link Applications and Services Supporting ATS Functions
      The following tables provide the data link applications and their associated data
      communications services that support each of the ATS functions.


                      Table 2-1:     Data Link Applications and Services Supporting ATS
                      Functions in Environment A

                                            F1            F2             F3              F4

                DLIC                  N/A           N/A            N/A             N/A

                ACM                                 S              S

                ACL                   S             S              S

                AMC                                 S              S

                DCL                                 S              S

                D-TAXI                              S              S

                FLIPINT               S             S                              S

                D-OTIS                                                             S

                ITP                   S

                4D-TRAD               S             S              S



                      Table 2-2:     Data Link Applications and Services Supporting ATS
                      Functions in Environment B

                                            F1            F2             F3              F4


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                                                SPR Draft E (FAA Evaluation Release) 30 April 2009

                   DLIC                   N/A           N/A              N/A              N/A

                   ACM                                  N                N

                   ACL                    N             N                N

                   AMC                                  N                N

                   DCL                                  N                N

                   D-TAXI                               N                N

                   FLIPINT                N             N                                 N

                   D-OTIS                                                                 S

                   ITP                    S

                   4D-TRAD                N             N                N

        Note: N=data communications service providing Normal Communications, S=data
        communications service providing Supplemental Communications (see paragraph 2.1 for an
        explanation of normal/supplemental communications).


2.2.1   Provision and Use
           Note: Data communications services are provided in an environment that is consistent
           with the standards set forth in ICAO material. Environments that deviate from this ICAO
           material will need to be assessed by the State against the criteria set forth in this standard
           to determine the suitability of the data communications services in such environments.




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                                               SPR Draft E (FAA Evaluation Release) 30 April 2009

3     Environmental Types and Characteristics
      This section defines the types of environment, including related ATS functions that are
      relevant to operational, safety and performance requirements established for the data
      communications services. The contents and level of detail are intended to capture the relevant
      information necessary to:
         establish operational requirements for the data communications services;
         establish mitigation strategies and related requirements for hazards identified for the data
          communications services; and
         establish performance requirements for the data communications services
      Environmental conditions related to each data communications service are contained in the
      relevant service descriptions which follow this section. Two environments were developed
      for the purposes of this document: Environment A and B.
      Note: Two initial data communications environments are described in RTCA DO-290 /
      EUROCAE ED120 (Continental) [Ref. 7] and RTCA DO306 / EUROCAE ED122 (Oceanic
      and Remote Airspaces) [Ref. 8].
      An ATS function is dependent on the capabilities and performance of a complete CNS/ATM
      system. Also, the capabilities and performance of each of the components, communication,
      navigation, surveillance and ATM of the CNS/ATM system are dependent on each other. For
      instance, the communication and surveillance capability and performance requirements for a
      given ATS function will depend on the navigation and air traffic management capability and
      performance requirements. In order to establish the capability and performance requirements
      for navigation and communication components, it will be necessary to consider the
      characteristics of relevant navigation, and air traffic management capabilities. Since the
      requirements for navigation and air traffic management capabilities are dictated by other
      standards, the characteristics are provided as environmental assumptions. These assumptions
      are based on a review of ICAO and other material referenced in paragraph 1.3.
      When the characteristics of the types or conditions provided in this document are not
      appropriate for an implementation, States may need to assess the impact on the institutional
      safety assessment results based upon the local conditions
      Table 3-1 through Table 3-3Table 3-3 and accompanying text presents a summary of the
      environment types for continental airspace in the Airport, TMA and En route domains.

3.1   Sector Density Calculations
      It is expected that in all domains, based upon the traffic demand growth depicted in Figure        Formatted: Font: 11 pt, Not Bold
      3-1Figure 3-1 and expected service usage, that the sector density described in application
      transactions per sector hour will increase. In this section, aircraft density was increased
      throughout the conceptual period of Environments A and B.




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                                              SPR Draft E (FAA Evaluation Release) 30 April 2009




                       Figure 3-1:    Worst Case Traffic Demand Growth
      The airport (APT), En route (ER) and Terminal Maneuvering Area (TMA) sector/position
      traffic density per hour will increase as shown in Table 3-1 (based on 3.7% traffic growth per
      year).


                       Table 3-1:   Sector Traffic Density as Average Aircraft Per Sector
                       Hour and Peak Instantaneous Aircraft Count (PIAC)

                                     Domain                                Env A          Env B

                                        Average Aircraft Per Sector Hour

             Airport                                                        179            222

             TMA                                                            104            129

             En Route                                                       104            129

                                 Peak Instantaneous Aircraft Count (PIAC)

             Airport – Departure Clearance                                   30             37

             Airport – Ground Control                                        48             70

             Airport – Tower                                                 18             26

             TMA                                                             27             44

             En Route                                                        41             95



      Note: Environment A and Environment B Peak Instantaneous Aircraft Count (PIAC) High
      Density traffic figures from FAA/Eurocontrol Future Communication Study COCR V 2.0.

3.2   Environment A - Mixed Performance Airspace
      In Environment A, the concept of Mixed-Performance Airspace is introduced. In mixed
      performance airspace, some of the aircraft will have data communications, others will not.
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                                                 SPR Draft E (FAA Evaluation Release) 30 April 2009
        For the data communications equipped aircraft, there will be differing capability levels
        including DO-306/ED-122 [Ref.8] and DO-290/ED-120 [Ref.7] and capabilities as defined in
        this document.

3.2.1   Environment A Operations
        In transitioning to the future ATM system, some enhanced operations will be performed in an
        operational environment which will be different from the initial data communications
        environment. Environment A characteristics are outlined in Table 3-2Table 3-2.

3.2.2   Environment A Characteristics
        The controller remains responsible for separation assurance while utilizing automation tools to
        assist in problem detection. Mixed performance airspace may co-exist with routes or blocks of
        high performance airspace as described in section 0.
        Table 3-2:      Mixed Performance Airspace Environmental Characteristics
                                              APT                       TMA                        ENR
              Communication          Voice is normal means     Voice is normal means      Voice is normal means
              capability             of communication.         of communication.          of communication.
                                     Use of Data is            Use of Data is             Use of Data is
                                     required to meet the      required to meet the       required to meet the
                                     operational objectives    operational objectives     operational objectives
                                     for non time critical     for non time critical      for non time critical
                                     communications.           communications.            communications.
              Navigation capability Precision Landing          Area Navigation            RNAV/RNP 4
                                    System                     (RNAV)/RNP 1               Reduced Vertical
                                    Visual separation                                     Separation Minima
                                                                                          (RVSM)
              Surveillance           Visual and voice          Surveillance               Surveillance
              capability             communication             application                application
                                     Surveillance              Airborne Traffic           Airborne Traffic
                                     application               Situational Awareness      Situational Awareness
                                     Airborne Traffic
                                     Situational Awareness


              Collision Avoidance    Surface Collision         Aircraft Collision         ACAS
              System                 Warning System            Avoidance System
                                                               (ACAS)
              Separation             Visual separation         Performance based          Performance based
              Assurance              applied by flight crews   operations aircraft will   operations aircraft will
                                     and runway                be de-conflicted for 20    be de-conflicted for 20
                                     occupancy controlled      minutes ahead. There       minutes ahead. There
                                     by tower controller.      will be real time          will be real time
                                     Runway incursion          monitoring of the          monitoring of the
                                     alerts are provided in    performance                performance
                                     the flight deck, the      compliance.                compliance.
                                     tower or both.            Exceptions will be         Exceptions will be
                                                               alerted and handled        alerted and handled
                                                               tactically.                tactically.



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                                               SPR Draft E (FAA Evaluation Release) 30 April 2009
                                           APT                      TMA                      ENR
            Separation             Longitudinal 2 or 3    3-5 NM                   5 NM
            (Horizontal)           minutes or wake
                                   turbulence criteria,
                                   whichever is greater
            Separation             Not applicable         1000 ft                  1000 ft
            (Vertical)                                                             2000 ft
                                                                                   RVSM
            Traffic complexity     Complex with visual    Complex route            RNAV complex route
                                   guidance.              structure with           structure
                                                          complex arrival and      Multiple levels of
                                                          departure routes         controller to aircraft
                                                          Multiple levels of       communications (i.e.,
                                                          controller to aircraft   voice, CPDLC,
                                                          communications (i.e.,    4DTRAD)
                                                          voice, CPDLC,            Potential reduction in
                                                          4DTRAD)                  separation
                                                          Potential reduction in
                                                          separation
            Aircraft Equipage      75% of aircraft are    75% of aircraft are      75% of aircraft are
                                   equipped with data     equipped with data       equipped with data
                                   communications.        communications           communications
            ATC                   1176                    2310                     1247
            Communications
            transactions per
            service hour and
            duration of an ATC 1230                       243                      675
            transaction (seconds)
            Flight Information    784                     2310                     832
            Services transactions
            per service hour and
                                  1230                    243                      675
            duration of a FIS
            transaction (seconds)
            Conformance            392                    1155                     416
            Management
            transactions per
            service hour and
            duration of an Conf    1230                   243                      675
            mgmt transaction
            (seconds)

            Note: The information in this table does not imply that all the items are required to be
            in the environment. They were used to perform the safety assessments when considering
            mitigation strategies.

3.3   Environment B – High Performance Airspace
      Environment B High Performance Airspace (HPA) requires 100% equipage. The high-
      performance aircraft’s ability to accurately fly its cleared flight path, coupled with the state


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                                                  SPR Draft E (FAA Evaluation Release) 30 April 2009
        and intent information sent from the aircraft to the ATC automation, will increase the
        accuracy of trajectory modeling and problem prediction.

3.3.1   Environment B Operations
        In this environment, departure fix to arrival fix based 4-D trajectories (4DT) will be flown and
        new modes of separation (e. g., self-separation) and reduction in required separation minima
        will be applied. More sophisticated automation tools for problem detection and resolution
        advisories and prioritization will be used to assist the controller.

3.3.2   Environment B Characteristics
        Table 3-3Table 3-3 summarizes the conceptual Environment B HPA environmental
        characteristics.
        Table 3-3:      High-Performance Airspace Environmental Characteristics
                                              APT                       TMA                        ENR
              Communication          Voice and data are       Voice and data are         Voice and data are
              capability             normal means of          normal means of            normal means of
                                     communications.          communications. Data       communications. Data
                                     Data is used for non-    is used for non-time       is used for non-time
                                     time critical            critical operations and    critical operations and
                                     operations and voice     voice is used for time     voice is used for time
                                     is used for time         critical situations.       critical situations.
                                     critical situations.
              Navigation capability Precision Landing         RNAV/RNP 0.5               RNAV/RNP 1
                                    Systems                                              RVSM
                                    Visual separation

              Surveillance           Visual and voice         Surveillance               Surveillance
              capability             communication.           application including      application including
                                     Surveillance             use of radar, ADS-B        use of radar, ADS-B
                                     Monitoring.              and ADS-C.                 and ADS-C.
                                     Cockpit display of       Deviation monitor.         Deviation monitor.
                                     TAXI clearances on a
                                     graphical display.
              Collision Avoidance    Surface Collision        Aircraft Collision         ACAS
              System                 Warning System           Avoidance System
                                                              (ACAS)
              Separation             Longitudinal is          Longitudinal is            Longitudinal is
              (Horizontal)           encounter-specific       encounter-specific         encounter-specific
                                     criteria only. Lateral   criteria only Lateral is   criteria only. Lateral is
                                     is 750 ft. between       collision avoidance        collision avoidance
                                     runway centrelines.      based.                     based.
                                     CDTI.                    CDTI                       CDTI
              Separation             N/A                      1000 ft                    1000 ft
              (Vertical)                                                                 2000 ft
                                                                                         RVSM




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                                       SPR Draft E (FAA Evaluation Release) 30 April 2009
     Traffic complexity    Complex with visual    Agreement based         Agreement based
                           guidance               trajectories connecting trajectories.
                                                  to complex arrival and
                                                  departure routes.
     Aircraft Equipage     100% of aircraft are   100% of aircraft are   100% of aircraft are
                           data communications    data communications    data communications
                           equipped.              equipped.              equipped
     Controller-Pilot      859                    2393                   1412
     Communications
     transactions per
     service hour
      and duration of an
                           934                    194                    984
     ATC transaction
     (seconds)
     Flight Information    1718                   4786                   942
     Services transaction
     per service hour and
                           934                    194                    984
     duration of a FIS
     transaction (seconds)
     Conformance           859                    2393                   471
     Management
     transactions per
     service hour and
                           934                    194                    984
     duration of an Conf
     mgmt transaction
     (seconds)

      Note: The information in this table does not imply that all the items are required to
      be in the environment. They were used to perform the safety assessments when
      considering mitigation strategies.




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