RADARSAT-1: Mission Performance and Plans

Surendra Parashar, Ahmed Mahmood, Dan Showalter, Satish Srivastava

Canadian Space Agencysurendra.parashar@space.gc.ca

IGARSS 2007Barcelona, Spain, July 23-27, 2007

As of 30 April 2007

Total minutes of data: 426,688Total orbits completed: 59,957Total of customer image requests: 274,534

Average System Performance: > 95%

Canada's first operational EO satellite

Sun-synchronous, Dawn–Dusk LEO

Altitude: 798 kmPeriod: 100.7 minutesRepeat Cycle: 24 days

Orbits per day: 14

ForestryCrop MonitoringAntarctic Mapping Missions (1997 & 2000)Background Mission (Global stereo coverage of landmass)

Ice MonitoringPollution MonitoringDisaster Watch – International CharterHurricane Watch

HH Polarized C-Band SARLaunched Nov. 1995 – Operational April 1996

Mission Lifetime: 5.25 years – Since Launch: 11 years

The Ground Infrastructure

6 Order Desks35 Data Reception Facilities

23 Archiving Facilities

Number of requests per Order Desk

CGOD,CIS,MCS/CAS: 112,829NASA/NOAA: 88,588

MDA (GSI): 79,247ESA: 0

RADARSAT-1 Reception CoverageRADARSAT-1 Reception Coverage

20042004

20032003

20022002

20012001

20002000

19991999

19981998

19971997

19961996

19951995 Data Reception Facilities: 35 (including 8 transportable stations)

Data Archiving Facilities: 23

Actually under certification: 0

Data Reception Facilities: 35 (including 8 transportable stations)

Data Archiving Facilities: 23

Actually under certification: 0

2 Transportable Stations (2000)

1 Transportable Stations (2003)

3 Transportable Stations (2004)

20052005

2 Transportable Stations (2005)2 Transportable Stations (2005)

20062006

Russia(2007)

Russia(2007)

Japan(1998)Japan(1998)

Korea(1998)Korea(1998)

China(1998)China(1998)

Thailand(2000)

Thailand(2000)

Singapore(1997)

Singapore(1997)

Malaysia(2003)

Malaysia(2003)

Alice Springs(1998)

Alice Springs(1998)

Hobart(1998)

Hobart(1998)

McMurdo(1995)

McMurdo(1995)

Benevento(2006)

Benevento(2006)

West Freugh(1996)

West Freugh(1996)

Tromso(1996)

Tromso(1996)

Turkey(2002)

Turkey(2002)

Norway(2007)

Norway(2007)

Kazakhstan (2)(2005)

Kazakhstan (2)(2005)

Saudi Arabia(1998)

Saudi Arabia(1998)

Moscow(2004)

Moscow(2004)

Fairbanks

(1995)Fairbanks

(1995)

Miami(2004)Miami(2004)

Gatineau(1995)

Gatineau(1995)

Prince Albert(1995)

Prince Albert(1995)

Brazil(2001)Brazil(2001)

Argentina(2002)

Argentina(2002)

Puerto Rico(2000)

Puerto Rico(2000)

20072007

Operational StatisticsOperational Statistics

Cumulative SAR On-Time (Minutes) as of April 2007

0

50000

100000

150000

200000

250000

300000

350000

400000

450000

500000

550000

Nov-95

Apr-96

Sep-96

Feb-97

Jul-97

Dec-97

May-98

Oct-98

Mar-99

Aug-99

Jan-00

Jun-00

Nov-00

Apr-01

Sep-01

Feb-02

Jul-02

Dec-02

May-03

Oct-03

Mar-04

Aug-04

Jan-05

Jun-05

Nov-05

Apr-06

Sep-06

Total

OBR

Real Time

% SAR On Time (Including Sharing)May 96 - Apr 07

US48%

Cdn Govt32%

RSI20%

Cdn Govt SAR On Time Including Sharing May 96- Apr 07

CIS34%

CAS0.8%

CGOD/ CCRS

6%

MCS59%

Canadian Government Request DistributionApr 97 - Apr 07

MCS70%

CIS17%

CAS5% CGOD/ CCRS

7%

Request Distribution Apr 97 - Apr 07

RSI27%

Cdn Govt 41%

US Govt32%

Operational StatisticsOperational Statistics

Beam Usage Distribution

Standard31%

Fine18%

ScanSAR41%

Wide8%

Extended2%

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

Operational StatisticsOperational Statistics

System Performance: Jul 1996 - Apr 2007

Received95.78%

Reception Loss1.38%

Payload Loss2.84%

RADARSAT-1 Weekly System Performance: July 31/96 to Apr 30/06

0

10

20

30

40

50

60

70

80

90

100

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

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)

S7SCW

S7 and S2/S4

S7 and W2

Background MissionBackground Mission

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.