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									SECTION 10: AREA NAVIGATION APPROACH
(ANA)-
LOCALIZER PERFORMANCE WITH VERTICAL
GUIDANCE (LPV) SURVEYS
________________________________________________
1. DESCRIPTION                                 be referenced to the North American
                                               Vertical Datum of 1988 (NAVD 88).
Area Navigation Approach (ANA) surveys
for Localizer Performance with Vertical        ANA-LPV surveys also establish (if it does
guidance (LPV) approach procedures             not exist) geodetic control in the airport
provide runway, obstruction, and other         vicinity consisting of a Temporary Survey
information to support precision and           Mark (TSM) accurately connected to the
nonprecision       instrument       approach   National Spatial Reference System (NSRS).
procedure development for conventional         This control and the NSRS connection
aircraft using area navigation systems, such   assures accurate relativity between surveyed
as, GPS. In addition, these surveys provide    points on the airport and between these
positions and elevations for selected          points and other surveyed points in the
navigational aids (NAVAIDS) associated         National Airspace System (NAS), including
with the airport.                              the navigation satellites. Refer to
.                                              http://www.ngs.noaa.gov/AERO/aerospecs.
                                               htm for geodetic control specifications and
2. DATUM TIE AND                               guidelines.
LOCAL   CONTROL
                                               3. ACCURACIES
Surveys accomplished in accordance with
these standards shall be tied to the NSRS.     Accuracy requirements for control station
Positions shall be referenced to the North     and obstruction data provided in accordance
American Datum of 1983 (NAD 83) which          within these specifications are identified in
is operationally equivalent to, and may be     Table 1 and Table 2.                Accuracy
used as, World Geodetic System of 1984         requirements for all other surveyed data
(WGS 84) values for charting and               identified in these specifications shall be in
navigation     purposes.    Refer       to:    accordance with FAA No. 405 standards.
http://www.ngs.noaa.gov/faq.shtml#Transfo      Accuracy requirements for control stations
rm for clarification of WGS 84 conversions.    are presented in Table 1.           Accuracy
Orthometric heights (MSL elevations) shall     requirements for obstructions are presented
                                               in Table 2.
                              TABLE 1 CONTROL STATIONS

                                                                 VERTICAL
ITEM              (VALUES ARE IN CENTIMETERS)          HORZ    ORTHO ELLIP     AGL
PRIMARY AIRPORT
CONTROL STATION (PACS) 1                              5        25     15       N/A
SECONDARY AIRPORT
CONTROL STATION (SACS) 2                              3         5      4       N/A
WIDE AREA AUGMENTATION
 SYSTEM (WAAS) REFERENCE STATION 1                    5        10     10       N/A
WIDE AREA AUGMENTATION
 SYSTEM (WAAS) REFERENCE STATION 3                    1       0.2      2       N/A
TEMPORARY AIRPORT
 SURVEY MARK (TSM) 1 (TO BE USED WITHOUT PACS OR      5        25     15       N/A
SAC)
1
  ACCURACIES ARE RELATIVE TO THE NEAREST NATIONAL GEODETIC SURVEY SANCTIONED
    CONTINUOUSLY OPERATING REFERENCE STATION
2
    ACCURACIES ARE RELATIVE TO THE PACS AND OTHER SACS AT THE AIRPORT
3
    ACCURACIES ARE RELATIVE TO THE OTHER WAAS REFERENCE STATION AT THE SITE
                                     TABLE 2
                     ANA-LPV APPROACH OBSTRUCTION ACCURACIES

                                                                                VERTICAL
      ITEM                (VALUES ARE FEET)                          HORZ      ORTHO ELLIP           AGL
 NON MAN-MADE OBJECTS, AND MAN-MADE OBJECTS
   LESS THAN 200 FEET AGL, THAT PENETRATE THE
FOLLOWING OBSTRUCTION IDENTIFICATION SURFACES:
                 THE PRIMARY SURFACE                                   20         10         10       N/A
         THOSE AREAS OF THE APPROACH SURFACE                           20         10         10       N/A
          WITHIN 10,200 FEET OF THE THRESHOLD
         THOSE AREAS OF AN APPROACH TRANSITION                         20         10         10       N/A
       SURFACE WITHIN 2,766 FEET OF THE THRESHOLD
                        (AREA T1)
        THOSE AREAS OF THE APPROACH TRANSITION                         50         20         20       N/A
        SURFACE FURTHER THAN 2,766 FEET FROM THE
        THRESHOLD BUT NOT MORE THAT 10,200 FEET
                  FROM THE THRESHOLD
             THE MISSED APPROACH SURFACE                               50         20         20       N/A


           THOSE AREAS OF THE APPROACH SURFACE                         100        50         50       N/A
             FURTHER THAN 10,200 FEET FROM THE
                        THRESHOLD

      THOSE AREAS OF THE APPROACH TRANSITION                           100        50         50       N/A
     SURFACE FURTHER THAN 10,200 FEET FROM THE
                       THRESHOLD
MAN-MADE OBJECTS EQUAL TO OR GREATER THAN 200
   FEET AGL THAT PENETRATE THE FOLLOWING
    OBSTRUCTION IDENTIFICATION SURFACES:
      THE PRIMARY SURFACE, THOSE AREAS OF THE                          20         10         10       10
     APPROACH AND TRANSITION SURFACES WITHIN
             10,200 FEET OF THE THRESHOLD
            THE MISSED APPROACH SURFACE                                20         10         10       10



                   Accuracies are relative to the nearest PACS, SACS, HRP, or TSM.

 Distances relative to the threshold or runway end are measured along the runway centerline or centerline
                                         extended to the abeam point.
4. REQUIRED              DATA        FOR          Runways shall be identified by the number
RUNWAYS                                           painted on the runway at the time of the
                                                  field survey. If a number is not painted on
Runway data shall be provided for all             the runway, the runway number published in
runways with a specially prepared hard            the United States Government flight
surface (SPHS) existing at the time of the        information publication "U.S. Terminal
field survey. Data shall be provided for          Procedures" current at the time of the field
non-SPHS runways only if specifically             survey shall be used.
requested by appropriate Federal Aviation
Administration authorities. If runway is          Surveyed runway points shall include the
under construction, then refer to FAA             Runway Thresholds and Touchdown Zone
Specification 405, Section 11, OEP Surveys,       elevation (if applicable). Additional profile
item #4.                                          points abeam are also required if the runway
                                                  is served by an Instrument Landing System.
Unless otherwise stated, all runway points        Stopways,      Blast    Pads,    and    other
shall be on the runway centerline.                supplemental profile points are not required.
                                                  Required data for SPHS runways are
                                                  presented in Table 3. (Also see Figure 1).




                                TABLE 3
                         REQUIRED RUNWAY DATA
                                          REQUIRED DATA
       RWY/STWY POINT            SPHS RWY             NON-SPHS RWY
                            LAT LON ELEV DIST LAT LON ELEV DIST
                                              1                      1
              AIRPORT ELEV              X   X                X     X
                                                                       2       2       2
                 RUNWAY ENDS         X        X    X               X       X       X
           DISPLACED THLDS           X        X    X               X       X
          TOUCHDOWN ZONE                           X
            POINT ABEAM GS           X        X    X
         POINT ABEAM MLSEL           X        X    X
    POINT ABEAM OFFSET LOC           X        X
    POINT ABEAM OFFSET LDA           X        X
    POINT ABEAM OFFSET SDF           X        X
  POINT ABEAM OFFSET MLSAZ           X        X
                      Note:         THE TOUCHDOWN ZONE ELEVATION IS REQUIRED ONLY FOR SPHS
                                    RUNWAYS WITH A LANDING LENGTH EQUAL TO, OR GREATER
                                    THAN 3,000 FEET.
                                    1) DISTANCE FROM NEAREST RUNWAY END
                                    2) THE RUNWAY END LATITUDE, LONGITUDE AND ELEVATION OF
                                    NON-SPHS RUNWAYS IS REQUIRED ONLY WHEN THE AIRPORT
                                    ELEVATION EXIST ON THE NON-SPHS RUNWAY.
A FACILITY IS CONSIDERED OFFSET IF LOCATED MORE THAN 10 FEET FROM THE RUNWAY
CENTERLINE/CENTERLINE EXTENDED.
                                               An obstruction, for purposes of this section,
5. NAVIGATIONAL AIDS                           is any object that penetrates an ANA-LPV
                                               obstruction identification surface (OIS).
ELECTRONIC NAVAIDS

A position, and sometimes an elevation,
depending on the navigational aid              6.2. OBSTRUCTION
(NAVAID), shall be provided for electronic     IDENTIFICATION SURFACES
NAVAID facilities associated with the
runway approach being surveyed. The            OIS dimensions for ANA-LPV surveys are
horizontal and vertical survey points for      presented in Tables 4 through 7, and Figures
electronic NAVAIDS are listed in FAA           2 and 3.
Standard No. 405, Appendix 4. NAVAIDS
not associated with the runway approach
being surveyed are not required.

Survey data is required for NAVAIDS
meeting all of the following three criteria:

    - The NAVAID is listed in Standard
    No. 405, Appendix 4.

    - The NAVAID is located within 10
    nautical miles of the Airport Reference
    Point.

    - The NAVAID is associated with an
    instrument approach procedure for the
    airport being surveyed and the
    procedure is published in the United
    States Government flight information
    publication "U.S. Terminal Procedures"
    current at the time of the field survey.
    This requirement also applies to Airport
    Surveillance Radars.


If the NAVAID is also an obstruction, the
obstruction requirements of Section 6 also
apply.

VISUAL NAVAIDS

Visual NAVAIDS are not required.


6. OBSTRUCTIONS

6.1. DEFINITION
                                      TABLE 4

                            PRIMARY SURFACE
                      AREA NAVIGATION APPROACH
___________________________________________________________________

BEGINS                            200 FT. ON APPROACH SIDE OF THRESHOLD

LENGTH                            200 FT.

WIDTH AT THRESHOLD                1,000 FT.

WIDTH AT THRESHOLD PLUS 200 FT.   1,000 FT.

SLOPE                             SEE "ELEVATION" BELOW

ELEVATION                         ELEVATION OF RUNWAY CENTERLINE AT THRESHOLD




THE PRIMARY SURFACE IS A 1,000 FOOT WIDE RECTANGLE CENTERED ON THE RUNWAY
CENTERLINE, BEGINNING 200 FEET ON THE APPROACH SIDE OF A RUNWAY THRESHOLD OR
DISPLACED THRESHOLD AND EXTENDING TO THE RUNWAY THRESHOLD OR DISPLACED
THRESHOLD.

                                      __________
                                     TABLE 5

                           APPROACH SURFACE
                      AREA NAVIGATION APPROACH
___________________________________________________________________

BEGINS                           200 FT. ON APPROACH SIDE OF RUNWAY END THRESHOLD
                                 (AT END OF PRIMARY SURFACE)

LENGTH                           20,000 FT.

BEGINNING WIDTH                  800 FT.

WIDTH AT 20,000 FT.              2,240 FT.

SLOPE                            50:1 FOR FIRST 2,566 FT. THEN 34:1 TO END OF
                                 APPROACH SURFACE

ELEVATION AT BEGINNING           ELEVATION OF THRESHOLD

ELEVATION AT 2,566 FT.           51.3 FT. ABOVE THRESHOLD

ELEVATION AT 20,000 FT.          564.1 FT. ABOVE THRESHOLD


THE APPROACH SURFACE IS CENTERED ON THE RUNWAY CENTERLINE/CENTERLINE EXTENDED.

WHEN RUNWAY END THRESHOLD IS DISPLACED, APPROACH SURFACE BEGINS 200 FEET ON
APPROACH SIDE OF DISPLACED THRESHOLD.

                                     __________
                                    TABLE 6

                    APPROACH TRANSITION SURFACE
                      AREA NAVIGATION APPROACH
___________________________________________________________________

BEGINS                          200 FT. ON APPROACH SIDE OF THRESHOLD

LENGTH                          20,000 FT.

BEGINNING WIDTH                 600 FT. (EACH SIDE OF APPROACH SURFACE)

WIDTH AT 20,000 FT.             2,910 FT. (EACH SIDE OF APPROACH SURFACE)

SLOPE                           7:1 PERPENDICULAR TO RUNWAY
                                CENTERLINE/CENTERLINE EXTENDED

TOP ELEVATION AT BEGINNING      85.7 FT. ABOVE THRESHOLD

TOP ELEVATION AT 2,566 FT.      179.4 FT. ABOVE THRESHOLD

TOP ELEVATION AT 20,000 FT.     979.9 FT. ABOVE THRESHOLD


TRANSITION SURFACES EXISTS ALONG THE ENTIRE LENGTH, AND ON EACH SIDE, OF THE
APPROACH SURFACE. THE WIDTH AND SLOPE ARE MEASURED PERPENDICULAR TO THE RUNWAY
CENTERLINE/CENTERLINE EXTENDED.



                                   __________
                                                       TABLE 7

                       MISSED APPROACH SURFACE
                      AREA NAVIGATION APPROACH
_______________________________________________________________________

BEGINS                                          1,300 FT. ON APPROACH SIDE OF THRESHOLD

LENGTH                                          7,800 FT.

BEGINNING WIDTH                                 2,333.3 FT.

WIDTH AT 7,800 FT.                             6,200 FT.

SLOPE                                           40:1

ELEVATION AT BEGINNING                          22 FT. ABOVE THRESHOLD

ELEVATION AT 7,800 FT.                          217 FT. ABOVE THRESHOLD


THE MISSED APPROACH SURFACE IS CENTERED ON THE RUNWAY CENTERLINE/CENTERLINE
EXTENDED.

                                                    __________


         6.3. SPECIAL CASES
                                                              6.3.2. Vehicular Traverse Ways
         6.3.1. Catenaries
                                                              In general, a vehicular traverse way shall be
         In most cases, the position and elevation of         treated as any other obstruction, except that
         supporting towers will adequately represent          the appropriate vehicle height allowance
         catenaries. These towers shall be treated as         must be included in the elevation. (See
         any other potential obstruction. However, if         "Obstruction Exemptions" in this subsection
         one, or both, towers are outside the limits of       for possible exemptions that may apply to
         the obstruction surface, the catenary itself         vehicular traverse ways).
         may become a significant obstruction. In
         these cases, a position and elevation shall be
         provided on the imaginary straight line              Vehicle Height Allowances follow:
         connecting the tops of the two adjacent
         catenary support towers at the highest point         Noninterstate roads     15 feet
         within the obstruction surface.           The
         elevation of this point shall be carried as an       Interstate roads        17 feet
         estimated maximum elevation (EME).
                                                              Railroads               23 feet
                                                      6.3.6. Manmade Objects Equal to or
                                                      Greater than 200 Feet Above Ground
                                                      Level (AGL)
6.3.3. Mobile Obstructions
                                                  The AGL elevation shall be determined for
Representative obstructions that are mobile       manmade objects equal to, or greater than,
within a defined area (except vehicles on         200 feet AGL. The AGL shall be measured
roads and railroads, and vessels which are        from the highest point of ground in contact
treated under separate headings) shall have       with either the object or the structure on
an estimated maximum elevation (EME)              which the object rests.          This AGL
determined for each area. EME points shall        requirement applies only to representative
be selected at: (1) the point nearest to the      objects that normally would be carried on
runway centerline at the threshold for            ANA-LPV survey products and does not
primary surface penetrations, (2) the most        necessarily require measuring all 200+ AGL
penetrating point for approach surface            manmade objects in the survey area.
penetrations, and (3) as appropriate to
represent each mobile object area. (See           6.3.7. Obstruction Exemptions
Figure 9)
                                                  The following obstructions are not required
The word "MOBILE," which always implies           to be measured or carried on ANA-LPV
an EME, shall be included in the object           Conventional Landing products:
name, such as, "MOBILE CRANE."
                                                         - Vegetation that is both obstructing
6.3.4. Obstructions Under Construction                   by less than three feet and with a
                                                         maximum cross sectional diameter
Representative obstructions that are under               no greater than one-half inch where
construction shall be identified as being                transected by an obstruction surface.
under construction, such as, "BUILDING
UNDER        CONSTRUCTION."                The           - Annual vegetation, such as annual
elevation at the time of the survey shall be             weeds, corn, millet, and sugar cane.
carried. However, if a construction crane
extends     above      the    feature    under           - Frangible objects under the control
construction, it is necessary and sufficient to          of airport authorities with locations
carry the elevation and position of the crane.           fixed by function. Examples are
                                                         runway and taxiway signs, and
6.3.5. Vessels                                           many approach light structures.

Because of uncertainties in determining                  - Roads with restricted public access
maximum vessel heights, travel limits, and               that are intended for airport/facility
frequency of passage, vessel heights and                 maintenance only. This exemption
locations shall not be provided. However, if             does not apply to airport service
a possible obstructing condition exists, an              roads associated with other airport
obstructing vessel caution shall be provided             operations, such as, food, fuel, and
on ANA-LPV survey products cautioning                    freight transportation.
that vessels may obstruct at certain times
and that further investigation by the data               - Construction equipment and
user regarding maximum vessel height,                    debris, including dirt piles and batch
travel limits, and frequency of passage is               plants, that are: (1) temporary in
advised. This exemption does not apply to                nature, (2) under the control of
vessels that are permanently moored.                     airport authorities, and (3) located
                                                         on airport property.
        - Vessels. However, if a possible                 approach area and also higher than
        obstructing condition exists, an                  the threshold. These objects may
        obstructing vessel caution shall be               or may not penetrate the approach
        provided on ANA-LPV survey                        surface and may be nonobstructing
        products cautioning that vessels may              EME points.
        obstruct at certain times and that
        further investigation by the data user            The highest obstruction between
        regarding maximum vessel height,                  2,566 feet and 10,000 feet of an
        travel limits, and frequency of                   approach area. This area is the
        passage is advised. This exemption                first 7,434 feet of the 34:1 slope
        does not apply to vessels that are                area.
        permanently moored.
                                                          The highest obstruction in the
        - Parked aircraft. The location and               approach area.
        maximum elevation of individual
        parked aircraft cannot be determined         - Transition Surfaces (See Figure 7)
        and shall not be provided under
        ANA-LPV surveys. This exemption                   The two highest obstructions in
        does not apply to aircraft that are               the first 2,566 feet (as measured
        permanently parked for display                    along the runway centerline or
        purposes.                                         centerline extended) of each
                                                          transition area.

6.4. SELECTION                                            The highest obstruction in the first
                                                          10,000 feet of each transition area.
Obstruction selection shall include a
representation of objects that penetrated                 The highest obstruction in each
ANA-LPV OIS's at the time of the field                    transition area.
survey. In addition, certain nonobstructing
objects may be required in the first 2,566           - Missed Approach Surface (See Figure
feet of the approach area. The special cases         8)
that apply to obstructions (see Subsection
6.3) also apply to these required                         The highest obstruction and the
nonobstructing objects.                                   most penetrating obstruction on
                                                          each side of the runway centerline
Required objects/obstructions include:                    or centerline extended.

    - Primary Surface (See Figure 4)             Note: obstructions may be EME points for
                                                 obstructing mobile object areas. (See Figure
         The highest obstruction on the          9)
         approach side of the threshold.

    - Approach Surfaces (See Figures 5 and       In some cases, strict adherence to the object
    6)                                           selection criteria listed above may result in
                                                 congestion or inadequate obstruction
         The     two    most   penetrating       representation.        To minimize these
         obstructions   and   the    most        situations, the following guidelines shall be
         penetrating man-made obstruction        followed in object selection:
         in the first 2,566 feet of an
         approach area.                              - If objects that are required in the
                                                     primary area or first 10,000 feet of an
         The two highest objects that are            approach area are located within 100
         within the first 2,566 feet of an
     feet of each other, the lower object may
     be omitted. (See Figure 6)
                                                  9. MISCELLANEOUS
     - If objects that are required outside the
     primary or first 10,000 of an approach       AIRPORT REFERENCE POINT
     area are located within 500 feet of each
     other, the lower object may be omitted.      The Airport Reference Point (ARP) shall be
     (Note: required primary or approach          computed using the centerline end positions
     objects shall not be omitted because of      of all usable runways. However, since
     the close proximity of higher objects        runways without specially prepared hard
     outside of the primary or approach           surfaces are often not required to be
     areas). (See Figure 6)                       surveyed, the ARP position for these
                                                  airports shall be approximate. The ARP
     - When a required object is omitted          shall be tagged with the year of the most
     because of congestion, a replacement         recent runway end survey used in the ARP
     object/objects shall be selected if          computation, such as, "ARP (1995)."
     possible that meets the spacing criteria.
                                                  Procedures for computing ARP are
     - Occasionally, additional obstruction       presented in FAA Standard No. 405,
     information may be useful in                 Appendix 2.
     representing     certain     obstructing
     conditions. While rigorous selection         10. DATA DELIVERY
     criteria is not practical, information
     useful to obstruction clearing activities    NGS SURVEYS
     should be considered in the selection.
                                                  ANA-LPV survey data shall be furnished in
                                                  the Universal Data Delivery Format
7. PLANIMETRIC DETAIL                             (UDDF). UDDF information, including
                                                  documentation,      is    available     at:
Planimetric detail is not required                http://www.ngs.noaa.gov/AERO/uddf.html.
                                                  The data shall be delivered to both
                                                  Aeronautical Information Services and AVN
                                                  and be designated as ANA-LPV survey.
8. METEOROLOGICAL
APPARATUS
                                                  3RD PARTY SURVEYS
Meteorological apparatus data is not
required unless it is selected as a               Refer to statement of Work for submission
representative obstruction.                       of data.

								
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