| Mission type | Communications |
|---|---|
| Operator | INSAT |
| COSPAR ID | 2007-037A |
| SATCAT no. | 32050 |
| Website | http://www.isro.org/satellites/insat-4cr.aspx |
| Mission duration | Planned: 12 years Achieved: 13 years, 2 months, 22 days |
| Spacecraft properties | |
| Bus | I-2K |
| Manufacturer | ISRO |
| Launch mass | 2,168 kilograms (4,780 lb) |
| Power | 3000 W |
| Start of mission | |
| Launch date | 2 September 2007, 12:51 UTC |
| Rocket | GSLV Mk.I F04 |
| Launch site | Satish Dhawan SLP |
| End of mission | |
| Disposal | Moved to a graveyard orbit |
| Deactivated | 24 November 2020 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 48°E (10 Feb 2017 to 24 Nov 2020) 74°E (till 12 Jan 2017) |
| Perigee altitude | 35,026 kilometres (21,764 mi)[1] |
| Apogee altitude | 36,235 kilometres (22,515 mi)[1] |
| Inclination | 0.15 degrees[1] |
| Period | 1,428.12 minutes[1] |
| Epoch | 14 September 2007[1] |
| Transponders | |
| Band | 12 Ku band |
| Coverage area | India |
| TWTA power | 140 watts |
| EIRP | 51.5 decibel-watts |
INSAT-4CR was a communications satellite operated by ISRO as part of the Indian National Satellite System. Launched in September 2007, it replaced the INSAT-4C satellite which had been lost in a launch failure the previous year. The satellite was initially stationed in geostationary orbit at a longitude of 74 degrees east, with expected operational life of at least ten years, however this may have been reduced by the underperformance of the Geosynchronous Satellite Launch Vehicle which placed it into orbit. INSAT-4CR is planned to be replaced by GSAT-31, which was launched on February 6, 2019.