IRS-1E
NamesIndian Remote Sensing satellite-1E
Indian Remote Sensing satellite-P1
Mission typeEarth observation
OperatorISRO
Websitehttps://www.isro.gov.in/
Mission duration3 years (planned)
Failed to orbit
Spacecraft properties
SpacecraftIRS-1E (P1)
BusIRS-1A
ManufacturerIndian Space Research Organisation
Launch mass846 kg (1,865 lb)
Dry mass766 kg (1,689 lb)
Dimensions1.56 m x 1.66 m x 1.10 m
Power415 watts
Start of mission
Launch date20 September 1993, 05:12 UTC
RocketPolar Satellite Launch Vehicle (PSLV-D1)
Launch siteSatish Dhawan Space Centre, First Launch Pad (FLP)
ContractorIndian Space Research Organisation
Entered serviceFailed to orbit
Orbital parameters
Reference systemGeocentric orbit (planned) [1]
RegimeSun-synchronous orbit
Perigee altitude817 km (508 mi)
Apogee altitude817 km (508 mi)
Inclination98.6°
Period103.0 minutes
Instruments
Linear Imaging Self-Scanning Sensor-1 (LISS-1)
Monocular Electro-Optical Stereo Scanner (MEOSS)
 

IRS-1E was an 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 launch vehicle, the satellite deviated from its path and plunged into the Indian Ocean.

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.[2] The letter "E" indicates that the satellite was an engineering model. 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).[3] It was launched on 20 September 1993.[4]

Instruments

IRS-1E carried two instruments:[1]

  • Linear Imaging Self-Scanning Sensor-1 (LISS-1)
  • MEOSS (Monocular Electro-Optical Stereo Scanner), built by the German Aerospace Center (DLR), is an experimental sensor with pushbroom Charge-coupled device (CCD) technology. MEOSS is a stereo camera system capable of recording three images simultaneously with a single lens by means of linear scanning (3-line stereo system).[5]

Launch

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, at 05:12 UTC. 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 satellite failed to reach orbit.[6] After this initial setback, the PSLV successfully completed its second mission in 1994.[7]

See also

References

  1. 1 2 "IRS-1A". WMO. 28 July 2015. Retrieved 12 May 2021.
  2. ↑ "Program: IRS". Weebau. 7 October 2005. Retrieved 13 May 2021.
  3. ↑ "IRS-P3". ESA Earth Online. Retrieved 13 May 2021.
  4. ↑ "IRS-1E". ISRO. Archived from the original on 17 March 2011. Retrieved 11 March 2013.
  5. ↑ "IRS (Indian Remote Sensing Satellites)". ESA Earth Observation Portal. Retrieved 12 May 2021.
  6. ↑ "India (Launchers)". Spacecraft Encyclopedia. Retrieved 13 May 2021.
  7. ↑ "IRS-1E (IRS-P1)". Gunter's Space Page. 7 July 2020. Retrieved 12 May 2021.
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