WMO OSCAR | Details for Satellite Programme: IRS

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Satellite Programme: Indian Remote-sensing Satellite

Programme details

Programme description	Series of 7 satellites for land observation, changing name starting from IRS-1 to IRS-P with IRS-1E=IRS-P1. Follow-on of early demonstration flights Bhaskara-1 and Bhaskara-2 launched in 1979 and 1981, respectively. Main improvements: 3-axes stabilisation, sunsynchronous orbit, more instruments more performing. After IRS-P3 the series was split as IRS-P4 = OceanSat-1, IRS-P5 = CartoSat-1, IRS-P6 = ResourceSat-1 Indian programme: ISRO responsible of development and operations. Platforms actively stabilised over 3 axes. Design lifetime; 3 years. Sunsynchronous orbits around 10:30. Replacemen policy based on launching satellites at roughly 1-year intervals. See detailed descriptions at http://www.isro.org/satellites/earthobservationsatellites.aspx, https://directory.eoportal.org/missions/irs, https://directory.eoportal.org/missions/irs-1c-1d and https://directory.eoportal.org/missions/irs-p3
Data circulation	Real-time downlink to the main ISRO station at Hyderabad and to a network of appointed acquisition stations in X-band. All data concentrated to the National Remote Sensing Center (NRSC) in Hyderabad for processing and distribution (through Antrix Corporation).
Agencies	ISRO
Programme lifetime	1988 - 2010

Associated satellites and instruments

Note: red tag => no longer operational , green tag => operational , blue tag => planned

Indian Remote-sensing Satellite
- IRS-1A (1988-1992)
  - LISS-1
  - LISS-2
- IRS-1B (1991-2001)
  - LISS-1
  - LISS-2
- IRS-1C (1995-2005)
- IRS-1D (1997-2010)
- IRS-1E (IRS-P1) (1993-1993)
  - LISS-1
  - MEOSS
- IRS-P2 (1994-1997)
  - LISS-2M
- IRS-P3 (1996-2004)
  - IXAE
  - MOS
  - WiFS