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  INSAT-2E
 


INSAT-2E, The latest of the INSAT-2 series of satellites built by ISRO, is a multi-purpose satellite for telecommunication, television broadcasting and meteriological services. The satellite is located at 83 degrees east longitude in geostationary orbit.

INSAT-2E carries seventeen transponders-12 operating in the normal C-band freequency and 5 in the lower extend C-band. Seven of the normal C-band transponders have wide beam coverage and the remaining have zonal coverages.

INSAT-2E is launched by European Arian Launch Vehicle to a Geosynchronous transfer orbit with a perigee of 200 km and an apogee of 35,980 km. The satellite is manoeuvred to its final orbit by firing the satellitea apogee motor in three phases. Subsequently, the deployment of solar array, antennae and the solar sail are carried out and the satellite commissioned after in-orbit checks.
.Salient Features
Orbit: Geostationary (83 degree E Longitude)
Dry Mass: 1,150 kg.
Mass of Lift-off: 2,550 kg.
Size: Cuboid 1.9 m x 1.77m x 2.4m with solar array on the south and solar sail & boom on the north.
Length when fully deployed: 26m
Spacecraft Propulsion and Control: 440 N Liquid Apogee Motor with N2O4 (Nitrogen Tetroxide) and MMH (Mono Methyl Hyudrazine) for orbit raising, 3-axis body stabilised in orbit using momentum wheels, sensors, solar flap, magnetic torque and sixteen Reaction Control Thrusters of 22 Newton each.
Power: Solar array generating 2,050 W. Two 60 Ah
Ni-H2 batteries to support full payload operation during eclipse period.
Mission life: 12 years.
   
.Payloads
Communication Payload
  • 12 C- band transponders, seven of which have wide beam coverage and five zonzl beam coverages.
  • 5 lower extended C-band transponders with zonal beam coverage.
  • All channels provide Edge Of Coverage - Effective Isotopic Radiated Power (EOC-EIRP) of 36 dBW
Meteorological Paqyload

Very High Resolution Radiometer (VHRR) with 2 km resolution in visible band and 8 km resolution and water vapour band.

Charge Coupled Device (CCD) camera operating in visible, near infrared and shortwave infrared band with 1km resolution.

 
Wide beam coverage
Zonal beam coverage
 
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