INSAT-4A
| Operator | ISRO |
|---|---|
| Bus | I-3K (I-3000) Bus |
| Mission type | Communications |
| Launch date | 22 Dec 2005, 04:2 IST |
| Carrier rocket | Ariane-5GS |
| Launch site | French Guyana |
| COSPAR ID | 2005-049A |
| Homepage | INSAT 4A |
| Mass | 3081 kg |
| Dimensions | 2.8 x 1.7 x 2.0 m |
| Power | 5922 W |
| Orbital elements | |
| Regime | GEO |
| Inclination | 74° |
| Orbital period | 24 hrs |
| Transponders | |
| Transponders | 12 Ku band & 12 C-band |
| Capacity |
For Ku band Uplink 14.00 - 14.50 GHz (V) Downlink 10.95 – 11.20 GHz (H) & 11.45 – 11.70 GHz (H) For C-Band Uplink 5950 – 6410 MHz (V) Downlink 3725 – 4185 MHz (H) |
| Twta output | 140 watts & 63 watts |
| Bandwidth | 36 MHz |
| EIRP | 51 dbW & 38 dbW |
INSAT-4A, is the first one in INSAT-4 Satellites series, provides services in Ku and C-band frequency bands. It is the heaviest satellite India has launched till date. 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 83o E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169)
Contents |
[edit] 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. Tata Sky, a joint venture between the TATA Group and STAR uses INSAT-4A for distributing their DTH service.
[edit] Launch
INSAT 4A was launched by Ariane-5 launch vehicle of 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 the lift-off in 3-axis stabilized mode, with a perigee (nearest point to earth) of 859 km and an apogee (farthest point to earth) of 36,055 km.Its co-passenger on board was Meteosat-9 of EUMETSAT.
[edit] Payload
- 12 Ku band transponders
- 12 C-band transponders
