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					RADARSAT-1: Mission Performance and
Plans


Surendra Parashar, Ahmed Mahmood, Dan Showalter, Satish
Srivastava

Canadian Space Agency
surendra.parashar@space.gc.ca




                     IGARSS 2007
            Barcelona, Spain, July 23-27, 2007
         Canada's first operational EO satellite

                         HH Polarized C-Band SAR
              Launched Nov. 1995 – Operational April 1996
          Mission Lifetime: 5.25 years – Since Launch: 11 years

                   Ice Monitoring
                   Pollution Monitoring
                   Disaster Watch – International Charter
                   Hurricane Watch
                   Forestry
                   Crop Monitoring
                   Antarctic Mapping Missions (1997 & 2000)
                   Background Mission (Global stereo coverage of landmass)

Sun-synchronous, Dawn–Dusk LEO        As of 30 April 2007
                  Altitude: 798 km    Total minutes of data: 426,688
             Period: 100.7 minutes    Total orbits completed: 59,957
             Repeat Cycle: 24 days    Total of customer image requests: 274,534
                 Orbits per day: 14   Average System Performance: > 95%
        The Ground Infrastructure


                   6 Order Desks
            35 Data Reception Facilities
               23 Archiving Facilities



          Number of requests per Order Desk

CGOD,CIS,MCS/CAS: 112,829       MDA    (GSI):   79,247
NASA/NOAA:        88,588        ESA:            0
RADARSAT-1 Reception Coverage
                                                                                                                            2007
                                                    Norway
                                                     (2007)
                                                                                                                            2006
 Fairbanks
                                                 Tromso
                                                  (1996)
                                                                                                            Russia          2005
                                                                                                            (2007)
  (1995)                                                         Moscow
             Prince Albert
                (1995)
                             Gatineau
                                               West Freugh
                                                                  (2004)
                                                                         Kazakhstan (2)       China
                                                                                                                            2004
                                                 (1996)       Turkey
                              (1995)                                         (2005)           (1998)
                                                              (2002)                                      Japan
                             Miami                                                               Korea
                                                                                                          (1998)            2003
                             (2004)               Benevento       Saudi Arabia
                                                    (2006)                          Thailand     (1998)
                               Puerto Rico
                                 (2000)
                                                                     (1998)
                                                                                     (2000)                                 2002
                                                                                          Singapore
                                                                               Malaysia     (1997)                          2001
                                      Brazil                                    (2003)
                                      (2001)
                                                2 Transportable Stations (2000)
                                                                                                   Alice Springs
                                                                                                       (1998)
                                                                                                                            2000
                               Argentina
                                 (2002)         1 Transportable Stations (2003)                                    Hobart
                                                                                                                   (1998)
                                                                                                                            1999
                                                3 Transportable Stations (2004)
                                                2 Transportable Stations (2005)                                             1998
                                                                                                                            1997
                                                                                     McMurdo
                                                                                      (1995)
                                                                                                                            1996

 Data Reception Facilities: 35 (including 8 transportable stations)
                                                                                                                            1995

 Data Archiving Facilities: 23
 Actually under certification: 0
                                                                       Operational Statistics
                                                                                                                                         550000
                                                                                                                                                  Canadian Government Request Distribution
      Cumulative SAR On-Time (Minutes) as of April 2007                                                                                                       Apr 97 - Apr 07
                                                                                                                   Total                 500000

                                                                                                                                         450000
                                                                                                                                                         CAS
                                                                                                                                         400000
                                                                                                                                                          5%                        CGOD/ CCRS
                                                                                                                                                                                       7%
                                                                                                                     Real Time           350000
                                                                                                                                                                  CIS
                                                                                                                                         300000                   17%

                                                                                                                                         250000

                                                                                                                                         200000
                                                                                                                                                                         MCS
                                                                                                                                                                         70%
                                                                                                                                         150000

                                                                                                                           OBR
                                                                                                                                         100000

                                                                                                                                         50000

                                                                                                                                         0
Nov- Apr- Sep- Feb- Jul- Dec- May- Oct- Mar- Aug- Jan- Jun- Nov- Apr- Sep- Feb- Jul- Dec- May- Oct- Mar- Aug- Jan- Jun- Nov- Apr- Sep-
 95 96     96 97     97   97   98   98 99     99   00   00   00   01   01 02     02   02 03     03   04   04   05   05   05 06     06




                        Request Distribution                                           % SAR On Time (Including Sharing)                          Cdn Govt SAR On Time Including Sharing
                          Apr 97 - Apr 07                                                      May 96 - Apr 07                                               May 96- Apr 07
                                                                                                                                                                            CGOD/
                                                                                                                                                           CAS
                                                                                                                                                                            CCRS
                                                                                                                                                           0.8%
                                                                                                                                                                             6%
                                                                                                    RSI
                                                                                                    20%
                           RSI
                           27%                                                                                                                          CIS
                                           Cdn Govt                                                                                                     34%
                                             41%                                                                                  US
                                                                                                                                 48%

                              US Govt
                                                                                                                                                                           MCS
                                                                                              Cdn Govt
                                32%                                                                                                                                        59%
                                                                                                32%
          Operational Statistics
                   Beam Usage Distribution
 Extended
    2%




                                                    Standard
                                                      31%




ScanSAR
  41%




            Wide                             Fine
             8%                              18%
                                                 Operational Statistics


System Performance: Jul 1996 - Apr 2007                                           RADARSAT-1 Weekly System Performance: July 31/96 to Apr 30/06
                                          Reception Loss
                                                                                                                                                                                                    100
                                              1.38%
 Payload Loss
    2.84%                                                                                                                                                                                           90


                                                                                                                                                                                                    80


                                                                                                                                                                                                    70


                                                                                                                                                                                                    60


                                                                                                                                                                                                    50


                                                                                                                                                                                                    40


                                                                                                                                                                                                    30


                                                                                                                                                                                                    20


                                                                                                                                                                                                    10


                                                   Received                                                                                                                                          0
                                                   95.78%     Jul-96   Mar-97 Nov-97 Jul-98   Mar-99 Nov-99   Jul-00   Mar-01 Nov-01   Jul-02 Mar-03 Nov-03   Jul-04   Mar-05 Nov-05   Jul-06   Mar-07




                System Performance is defined as the % of planned requests which were properly
                executed by the payload and successfully received by the reception facilities
BUS

Power, Thermal, Propulsion, Mechanisms all Nominal

Attitude Control: Nominal Performance
      – Momentum wheels & all redundant units: unserviceable
      – Control using magnetorquers only, except short term

TT&C: Nominal Operations
      – Redundant down-link Xmitter reduced capability
      – Degraded operation feasible after prime failure

PAYLOAD

SAR Antenna: Nominal Operations

SAR System: Nominal Operations, no redundancy

OBR: Nominal Operations, one unit only (One d/l per day)
      Background Mission




SCW                                S7




                         S7 and
                         S2/S4
                       S7 and W2
                  Future Plans


• Continue to use satellite resources prudently so as
  to prolong satellite life.

• Emphasize maintenance and safety, not undertake
  performance enhancements, and minimize risks.

• Continue Operations Transition Planning to allow
  smooth transfer from RADARSAT-1 to RADARSAT-2
  operations, utilization and markets.

• RADARSAT-1 Ops funding in place until March 30,
  2009, this ensuring overlap with RADARSAT-2 Ops.

				
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