INSAT-4A spacecraft in deployed configuration
| |
| Mission type | Communications |
|---|---|
| Operator | INSAT |
| COSPAR ID | 2005-049A  |
| SATCAT no. | 28911 |
| Website | INSAT 4A |
| Mission duration | Planned: 12 years Achieved: 13 years, 9 months, 29 days |
| Spacecraft properties | |
| Bus | I-3K |
| Manufacturer | ISRO |
| Launch mass | 3,081 kilograms (6,792 lb) |
| Dry mass | 1,386 kilograms (3,056 lb)[1] |
| Dimensions | 2.8 x 1.7 x 2.0 m |
| Power | 5,922 watts |
| Start of mission | |
| Launch date | 21 December 2005, 22:33 (2005-12-21UTC22:33Z) UTC |
| Rocket | Ariane 5GS |
| Launch site | Kourou ELA-3 |
| Contractor | Arianespace |
| End of mission | |
| Disposal | Moved to a graveyard orbit |
| Deactivated | 21 October 2019 (2019-10-22)[2] |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Slot | 83° East (0°N 83°E / 0°N +83°E / 0; +83) |
| Period | 24 hours |
| Transponders | |
| Band | 12 Ku band 12 C-band |
| Bandwidth | 36 megahertz |
| TWTA power | 140 & 63 watts |
| EIRP | 51 & 38 dbW |
INSAT-4A was the first one in the INSAT-4 Satellites series, providing services in the Ku and C band frequency bands. At the time of launch, it was the heaviest satellite India had produced. The Ku transponders cover the Indian main land and C-Band transponders cover an extended area. It has a dozen Ku transponders and another dozen of C-band transponders. This spacecraft was placed at 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169).[3][4][5][6]
INSAT-4A was a communication satellite intended for providing high quality television, telecommunication, broadcasting services and was the first satellite to be launched in the INSAT-4 series.
INSAT-4A was launched by an Ariane 5, produced by Arianespace, on 21 Dec 2005 at 22.33 UTC[7][8] from Kourou, French Guiana. It was placed into a Geosynchronous Transfer Orbit (GTO), 30 minutes after lift-off in 3-axis stabilized mode, with a perigee of 859 km and an apogee of 36,055 km. Its co-passenger on board was Meteosat-9ofEUMETSAT.
The satellite was placed in the graveyard orbit on 21 October 2019 after almost 14 years in service.[2] A replacement satellite GSAT-30 was launched on 21:05 UTC, 16 January 2020 aboard Ariane 5 VA251.[9][10]
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