IRS-1E

IRS-1E was an experimental Earth observation mission launched under the National Natural Resources Management System (NNRMS) programme by Indian Space Research Organisation (ISRO). Sometimes written IRS-P1. The objective of the mission was to develop Earth imagery using instruments carried on board. Due to a malfunction of the rocket, the satellite deviated from its path and plunged into the sea.

IRS-1E
Mission typeEarth observation
Remote sensing
OperatorISRO
Mission duration3 years (planned)
Failed to Orbit
Spacecraft properties
BusIRS-1A
ManufacturerISRO
Launch mass846 kg
Power415 watts
Start of mission
Launch date20 September 1993
RocketPSLV-D1
Launch siteSriharikota, FLP
ContractorISRO
End of mission
DisposalFailed to orbit
Decay date20 September 1993
Orbital parameters
Reference systemGeocentric
RegimeSun-synchronous
EpochPlanned
 

History

IRS-1E was a follow-up mission to the satellite IRS-1A, to develop India's capability in the field of remote sensing. The satellite was to take up missions in the area of ground-water exploration, land use, forest and flood mapping.[1] The letter "P" (IRS-P1) in the Indian Remote Sensing Programme of Earth observation satellite indicates that the satellite was to be launched aboard a Polar Satellite Launch Vehicle (PSLV).[2] It was launched on 20 September 1993.[3]

Payloads

IRS-1E carried two payloads:

  • LISS-1 (Linear Imaging Self Scanner)
  • MEOSS (Monocular Electro-Optical Stereo Scanner), built by the DLR[4]

Mission Result

IRS-1E mission was a failure, as the last stage of the PSLV-D1 malfunctioned, so failed to launch the satellite into its desired orbit. The PSLV was first launched on 20 September 1993. The first and second stages performed as expected, but an attitude control problem led to the collision of the second and third stages at separation, and the payload failed to reach orbit.[5] After this initial setback, the PSLV successfully completed its second mission in 1994.[6]

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See also

References
  1. "Program: IRS". World Space stamp catalog. 7 October 2005. Retrieved 11 March 2013.
  2. "IRS-P3". Earthnet Online. Retrieved 2 February 2013.
  3. "IRS-1E". Indian Space Research Organisation. Retrieved 11 March 2013.
  4. "IRS (Indian Remote Sensing Satellites) - Overview and early LEO Program of ISRO". eoPortal.org. Retrieved 11 March 2013.
  5. "India (Launchers)". Spacecraft Encyclopedia. Retrieved 12 November 2014.
  6. "PSLV (1)". Gunter's Space Page. Retrieved 12 November 2014.
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