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IRS-P3 (Indian Remote Sensing Satellite) was an Indian experimental earth observation satellite.

The satellite was based on the IRS P2 design.

The satellite carried three instruments:

  • WiFS (Wide Field Sensor), an ISRO pushbroom imager of IRS-1C and IRS-1D heritage, but extended to 3 channels. It has a resolution of 188 m. The objectives of WiFS observations are to monitor the vegetation index on land and to observe the ocean surface.
  • MOS (Multispectral Optoelectronic Scanner), an experimental imaging pushbroom spectrometer for VNIR/SWIR range observations provided by DLR, Berlin. The objective is to monitor the Earth's surface (surface-atmosphere interaction, ocean color, phytoplankton, regional and global distributions of man-made aerosols and their links to gaseous admixtures, spectral and spatial cloudiness characteristics, etc.) in the VNIR/SWIR region of 0.4 - 1.6 m.
  • IXAE (Indian X-ray Astronomy Experiment), an ISRO/ISAC and TIFR (Tata Institute of Fundamental Research, Mumbai, India) cooperative experimental astronomy instrument package with the objective to study periodic and aperiodic intensity and spectral variations in X-ray sources.

IRS-P3 was launched on the third flight of the PSLV-G (1) launch vehicle in March 1996. The IRS-P3 spacecraft continued in operations until fall of 2004.

Nation: India
Type / Application: Earth observation
Operator: ISRO
Contractors: ISRO
Equipment: WiFS, MOS, IXAE
Configuration: IRS-1 Bus
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 3 years (design); 6 years (achieved)
Mass: 930 kg
Orbit: 818 km × 821 km, 98.8
Satellite COSPAR Date LS Launch Vehicle Remarks
IRS P3 1996-017A 21.03.1996 Sr FLP PSLV-G (1)


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