INSAT-4A
| Mission type | Communications |
|---|---|
| Operator | ISRO |
| COSPAR ID | 2005-049A |
| SATCAT no. | 28911 |
| Website | INSAT 4A |
| Spacecraft properties | |
| Bus | I-3K |
| Launch mass | 3,081 kilograms (6,792 lb) |
| Dimensions | 2.8 x 1.7 x 2.0 m |
| Power | 5,922 watts |
| Start of mission | |
| Launch date | 21 December 2005, 22:33 UTC |
| Rocket | Ariane 5GS |
| Launch site | Kourou ELA-3 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 83° East (0°N 83°E / 0°N +83°E) |
| Inclination | 74 degrees[citation needed] |
| 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, is 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 and launched. 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 is placed at 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169)
Overview
INSAT - 4A is a communication satellite intended for providing high quality television, telecommunication, broadcasting services and is the first satellite to be launched in the INSAT-4 series.
Launch
INSAT 4A was launched by an Ariane 5, produced by Arianespace, on 22 Dec 2005 at 4.22 am IST from Kourou, French Guyana. 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-9 of EUMETSAT.
Payload
- 12 Ku band transponders
- 12 C-band transponders