Engineering:EOS 02

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Short description: Indian Earth observation satellite
EOS-02
SSLV-D1, EOS-02 - Primary payload EOS-02 in cleanroom before encapsulation.jpg
NamesEOS-02 / Microsat-2A
Mission typeEarth observation
OperatorISRO
Websitehttps://www.isro.gov.in/
Mission duration55 minutes
Orbits completed<1
Spacecraft properties
SpacecraftEOS-02
ManufacturerISRO
Launch mass135 kg
Start of mission
Launch date03:48 UTC, 7 August 2022
RocketSmall Satellite Launch Vehicle
Launch siteSatish Dhawan Space Centre, First launch Pad (FLP)
ContractorISRO
End of mission
Decay date7 August 2022 04:43 UTC
Orbital parameters
RegimeLow Earth (intended)
Transatmospheric (achieved)
Periapsis altitude76 km (47 mi)
Apoapsis altitude356 (221 mi)
Inclination37.2
 

EOS-02 (formerly known as Microsat-2A) was an India Earth observation microsatellite developed by the Indian Space Research Organisation as a test payload on the maiden launch of the Small Satellite Launch Vehicle (SSLV).[1] EOS-02 was based on Microsat-TD. The objective behind EOS-02 was to realize and fly an experimental imaging satellite with short turnaround time to showcase launch on demand capability.[2]

It was intended to be used for cartographic applications at a cadastral level, urban and rural management, coastal land use and regulation, utilities mapping, development and various other GIS applications. The satellite carried two payloads: a mid-wavelength and a long-wavelength infared camera with a 6m resolution.[3]

Launch

EOS-02 was launched on Small Satellite Launch Vehicle's maiden flight SSLV-D1 at 03:48 UTC / 09:18 IST on 7 August 2022,[4][5] but due to the final VTM stage failure, the rocket entered a transatmospheric orbit of 356 km x 76 km (221 mi x 47 mi) instead of the planned circular 356 km (221 mi) circular orbit. As a result, both satellites onboard (EOS-02 and AzaadiSAT) were destroyed during reentry.[6]

References

  1. ↑ "India's GISAT-1, Microsat 2-A, GSAT-12R, RISAT-2BR2 satellites ready for launch, says senior ISRO official" (in en). https://www.dnaindia.com/science/report-india-s-gisat-1-microsat-2-a-gsat-12r-risat-2br2-satellites-ready-for-launch-says-senior-isro-official-2843780. 
  2. ↑ "India Completes Maiden SSLV Mission, ISRO Says Orbit Achieved Was 'Less Than Expected'" (in en). 2022-08-07. https://www.news18.com/news/india/india-completes-maiden-sslv-mission-isro-says-orbit-achieved-was-less-than-expected-5704285.html. 
  3. ↑ "Annual Report 2019-20 (English)". https://www.isro.gov.in/sites/default/files/flipping_book/annual_report_2019-20_english/index.html. 
  4. ↑ "ISRO's next-gen rocket SSLV to have maiden launch by July-end". WION. 30 June 2022. https://www.wionews.com/india-news/isros-next-gen-rocket-sslv-to-have-maiden-launch-by-july-end-493369. 
  5. ↑ Indian Space Research Organisation [@ISRO] (1 August 2022). "The launch of the SSLV-D1/EOS-02 Mission is scheduled for Sunday, August 7, 2022, at 9:18 am (IST) from Satish Dhawan Space Centre (SDSC), Sriharikota. ISRO invites citizens to the Launch View Gallery at SDSC to witness the launch.". https://twitter.com/ISRO/status/1554003107545092096. 
  6. ↑ Indian Space Research Organization [@isro] (2022-08-07). "SSLV-D1/EOS-02 Mission update: SSLV-D1 placed the satellites into 356 km x 76 km elliptical orbit instead of 356 km circular orbit. Satellites are no longer usable. Issue is reasonably identified. Failure of a logic to identify a sensor failure and go for a salvage action caused the deviation. A committee would analyse and recommend. With the implementation of the recommendations, ISRO will come back soon with SSLV-D2. A detailed statement by Chairman, ISRO will be uploaded soon.". https://twitter.com/isro/status/1556208112138215424. 



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