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GSat 12, 12R (CMS 01)

GSat 12 [ISRO]

GSAT-12 is an Indian communications satellite being realised as replacement INSAT-3B. The satellite carries 12 Extended C-band transponders and is positioned at 83º East longitude colocated with Insat-2E and Insat-4A with a mission life of 7 years.

The bus system is based on I-1K (I-1000) platform with ASIC based BMU and 64 Ah Li-ion batteries. The satellite weighs 1375 kg with a payload power of 550W and launch is planned onboard PSLV-XL during 2010. The launch vehicle put the GSAT-12 into an elliptical transfer orbit (Sub-GTO) of 284 km perigee and 21000 km apogee. The satellite’s Liquid Apogee Motor raises both apogee and perigee and put the satellite into the circular geostationary orbit of 36000 km.

A similar replacement, GSAT 12R, was launched in December 2020.

Nation: India
Type / Application: Communication
Operator: Insat
Contractors: ISRO
Equipment: 12 Extended C-band transponders
Configuration: I-1K (I-1000) Bus
Propulsion: LAM
Power: 2 deployable solar arrays, batteries
Lifetime: 7 years
Mass: 1410 kg (#12); 1450 kg (#12R)
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
GSat 12 2011-034A 15.07.2011 Sr SLP PSLV-XL
GSat 12R (CMS 01) 2020-099A 17.12.2020 Sr SLP PSLV-XL


Further GSat missions:

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