GSAT-12

GSAT-12

Mission type	Communications
Operator	ISRO
COSPAR ID	2011-034A
SATCAT no.	37746
Mission duration	Planned: 8 years Duration: 11 years, 8 months, 8 days
Spacecraft properties
Launch mass	1,412 kilograms (3,113 lb)
Dry mass	559 kilograms (1,232 lb)[1]
Start of mission
Launch date	15 July 2011, 11:18 (2011-07-15UTC11:18Z) UTC
Rocket	PSLV-XL C17
Launch site	Satish Dhawan SLP
Contractor	ISRO
End of mission
Disposal	Graveyard orbit
Deactivated	March 2023
Orbital parameters
Reference system	Geocentric
Regime	Geostationary
Longitude	48°E (Relocated: 19 Mar 2021.) 83°E (till 9 Feb 2021)
Perigee altitude	35,782 kilometres (22,234 mi)
Apogee altitude	35,803 kilometres (22,247 mi)
Inclination	0.01 degrees
Period	23.93 hours
Epoch	25 December 2013, 01:49:32 UTC[2]
Transponders
Band	12 Extended C band
GSAT

GSAT-12 was a communication satellite designed and developed by the Indian Space Research Organisation. It was the second satellite to be launched and placed on a GTO using PSLV.^[3]

Satellite

GSAT-12 was considered to be a replacement of the aged satellite INSAT-3B. It provided services like tele-education, tele-medicine, disaster management support and satellite internet access.^[4]

Payloads

GSAT-12 was equipped with 12 Extended C-band transponders.

Launch

GSAT-12 was launched onboard PSLV-XL C17 from second launch pad of Satish Dhawan Space Centre on July 15, 2011.^[5] The tentative life of satellite was 8 years.^[6][7]

Replacement and relocation

While GSAT-12 was still operational a replacement satellite CMS-01(formerly GSAT-12R) was launched on 17 December 2020.^[8] GSAT-12 was relocated from 83°E slot to 48°E slot on 19 March 2021.^[9]

End of mission

In March 2023 GSAT-12 was retired from its operational service. After seven maneuvers to raise the satellite to a circular graveyard orbit, 390 km above GEO belt.^[10][11][12]

References

1. "UCS Satellite Database". Union of Concerned Scientists. Archived from the original on 4 January 2014. Retrieved 25 December 2013.
2. Peat, Chris (25 December 2013). "GSAT 12 - Orbit". Heavens Above. Retrieved 25 December 2013.
3. "GSAT-12/12R". Gunter Space Page. Retrieved 6 October 2020.
4. "GSAT-12 reaches its home in a circular geo-synchronous orbit". The Hindu. Jul 15, 2011. Retrieved March 20, 2013.
5. "ISRO successfully launches latest communication satellite GSAT-12". Economic Times. Jul 15, 2011. Archived from the original on September 23, 2013. Retrieved March 20, 2013.
6. "GSAT-12". space.skyrocket.de.
7. "GSAT-12 powered by PSLV is ready to launch". engineersworldonline.com. Archived from the original on 2016-03-03. Retrieved 2011-07-14.
8. "ISRO gearing up for rocket launches with Virtual Launch Control Centre". The Tribune. 5 October 2020.
9. "Historical satellite position data for GSAT-12 for the month of March 2021". www.satellite-calculations.com. Archived from the original on 2021-03-21. Retrieved 2021-03-21.
10. "Monthly Summary of Department of space for the month of March 2023" (PDF). 20 April 2023. Archived from the original (PDF) on 19 April 2023. The post mission disposal of GSAT-12 was successfully carried out through 7 manoeuvres to raise the satellite to a circular super-GEO synchronous orbit 390 km above GEO belt.
11. "Historical satellite position data for GSAT-12 for the month of March 2023Satellite launched: 2011-07-15". www.satellite-calculations.com. Retrieved 2023-04-19.
12. "Post Mission Disposal of GSAT-12". www.isro.gov.in. Retrieved 2023-04-21.