Open main menu

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)

Mission typeCommunications
COSPAR ID2005-049A
SATCAT no.28911
WebsiteINSAT 4A
Spacecraft properties
Launch mass3,081 kilograms (6,792 lb)
Dimensions2.8 x 1.7 x 2.0 m
Power5,922 watts
Start of mission
Launch date22 December 2005, 22:33 (2005-12-22UTC22:33Z) UTC
RocketAriane 5GS
Launch siteKourou ELA-3
Orbital parameters
Reference systemGeocentric
Longitude83° East (0°N 83°E / 0°N +83°E / 0; +83Coordinates: 0°N 83°E / 0°N +83°E / 0; +83)
Inclination74 degrees[citation needed]
Period24 hours
Band12 Ku band
12 C-band
Bandwidth36 megahertz
TWTA power140 & 63 watts
EIRP51 & 38 dbW


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 Guiana. 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.


  • 12 Ku band transponders. It is being used by Tata Sky.[1]
  • 12 C-band transponders



  1. ^ "Tata Sky uses INSAT4A and GSAT-10 transponders". Retrieved 6 April 2018.
  2. ^
  3. ^