Insat 4B [ISRO]
INSAT 4A and INSAT 4B are dedicated to telecommunications, with 12 Ku band and 12 C-band transponders each. Their coverage zone is the Indian sub-continent.
Designed, built and integrated by ISRO, the INSAT 4A and INSAT 4B satellites will each weigh about 3,200 kg at liftoff.
INSAT-4 series is planned to have seven satellites, INSAT-4A through INSAT-4G with INSAT-4D as a spare. The transponder capacity of this series has been worked out after evaluating the requirement projected by different uses/user departments. It is planned that, by 2007, INSAT system will have about 250 transponders in various bands catering to a demand of up to 11 Giga Bits Per Second (GBPS) capacity.
Insat 4A was to be replaced by mid 2019 by GSat 30, but the launch of the replacement was delayed to 2020. Insat 4A was sent to a graveyard orbit in october 2019.
|Type / Application:||Communication|
|Equipment:||12 Ku-band transponders, 12 C-band transponders|
|Configuration:||I-3K (I-3000) Bus|
|Propulsion:||440 Newton thrust liquid apogee motor|
|Power:||2 deployable solar arrays, batteries|
|Mass:||3081 kg (#4A); 3028 kg (#4B), 1335 kg (dry)|
|Insat 4A||2005-049A||21.12.2005||Ko ELA-3||Ariane-5GS||with MSG 2|
|Insat 4B||2007-007A||11.03.2007||Ko ELA-3||Ariane-5ECA||with Skynet 5A|