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From Wikipedia, the free encyclopedia

NamesIndian Remote Sensing satellite-P3
Mission typeEarth Observation
COSPAR ID1996-017A
SATCAT no.23827
Mission duration3 years (planned)
8.5 years (achieved)
Spacecraft properties
ManufacturerIndian Space Research Organisation
Launch mass922 kg (2,033 lb)
Dry mass838 kg (1,847 lb)
Dimensions1.56 m x 1.66 m x 1.10 m
Power873 watts
Start of mission
Launch date21 March 1996, 04:53 UTC
RocketPolar Satellite Launch Vehicle, PSLV-D3
Launch siteSatish Dhawan Space Centre, First Launch Pad (FLP)
ContractorIndian Space Research Organisation
Entered serviceJune 1996 [1]
End of mission
Deactivated15 October 2004
Orbital parameters
Reference systemGeocentric orbit
RegimeSun-synchronous orbit
Perigee altitude802 km (498 mi)
Apogee altitude848 km (527 mi)
Period101.4 minutes
Multispectral Opto-electronic Scanner (MOS)
Indian X-ray Astronomy Experiment (IXAE)
Wide-Field Sensor (WiFS)
← IRS-1C
IRS-1D →

IRS-P3 was the sixth satellite in Indian Remote Sensing satellite series, an Earth observation mission launched under the National Natural Resources Management System programme (NNRMS) undertaken by Indian Space Research Organisation (ISRO). The objectives of the mission was processing and interpretation of data generated by its two instruments, the Wide-Field Sensor (WiFS) and Modular Opto-electric Sensor (MOS), developed by the German Aerospace Center (DLR).[2]


IRS-P3 was remote sensing satellite launched by ISRO on board of Polar Satellite Launch Vehicle (PSLV) launch vehicle for remote sensing of Earth's natural resources. It also hosted a scientific instrument, the Indian X-ray Astronomy Experiment (IXAE), for the study of X-ray astronomy. The IRS-P3 satellite contained an X-ray astronomy instrument, a C-band transponder and two remote sensing instruments. IRS-P3 was one of the satellite in the Indian Remote Sensing Programme of Earth Observation satellites, assembled, launched and maintained by Indian Space Research Organisation. There was no data recording device on board of the IRS-P3 and data was transmitted in real-time to the ground stations in Hyderabad, India and Neustrelitz, Germany.[2]


IRS-P3 carried two remote sensing instruments and one X-ray astronomy experiment:

  • Modular Opto-electronic Scanner (MOS) [3] which was provided by German Aerospace Center (DLR), in the framework of a cooperative agreement between ISRO and DLR. MOS was designed for ocean remote sensing.[4]
  • Indian X-ray Astronomy Experiment (IXAE). IXAE was to study the time variability and spectral characteristics of cosmic X-ray sources and for detection of transient X-ray sources. The experiment was developed by ISRO Satellite Centre (URSC) and Tata Institute of Fundamental Research (TIFR). The experiment was intended to study periodic and aperiodic intensity variation in galactic/extragalactic X-ray, spectral characteristics of various sources and properties of newly discovered X-ray transients. IXAE instruments consisted of three identical pointed mode proportional counters (PPCs) operated in the energy range 2-20 keV, FOV of 2° x 2° and effective area of 1200 cm2, and an X-ray sky monitor (XSM) operating in the energy range 2-10 keV.
  • Wide-Field sensor (WiFS) with additional Short-Wave Infrared band (SWIR). The sensor was designed for vegetation dynamic studies.


IRS-P3 was launched by the PSLV-D3 launch vehicle on 21 March 1996, at 04:53 UTC, from Satish Dhawan Space Centre, Sriharikota, India. Periodic calibration of Polar Satellite Launch Vehicle tracking radar located at tracking stations.


The mission was completed on 15 October 2004 after serving for 8.5 years.[1] With the consecutive successful launches of the PSLV, it was decided not to plan any more Augmented Satellite Launch Vehicle (ASLV) missions.[5]

See also


  1. ^ a b "IRS-P3". WMO. 28 July 2015. Retrieved 13 May 2021.
  2. ^ a b "A Spaceborne Imaging Spectrometer for Ocean Remote Sensing". International Ocean Colour Coordinating Group (IOCCG). May 1997. Retrieved 13 May 2021.
  3. ^ "IRS-P3". ISRO. Retrieved 2 February 2013.
  4. ^ "The IRS-P3 remote sensing mission". Science Direct. November–December 1996. Retrieved 13 May 2021.
  5. ^ "Polar Satellite Launch Vehicle". Space Yuga. Archived from the original on 7 February 2012. Retrieved 13 May 2021.

External links

This page was last edited on 29 June 2021, at 21:45
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