INSAT-4A

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INSAT 4A
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[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 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 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169)

Overview[edit]

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[edit]

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.

Payload[edit]

  • 12 Ku band transponders
  • 12 C-band transponders

References[edit]

[1] [2]