Mission type Communications
Operator ISRO
COSPAR ID 2005-049A
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 (2005-12-21UTC22:33Z) 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 / 0; +83Coordinates: 0°N 83°E / 0°N +83°E / 0; +83)
Inclination 74 degrees
Period 24 hours
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)


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.


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.



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