With 12 high power Ku-band transponders and 12 C-band transponders, INSAT-4B will further augment the INSAT capacity for Direct-To-Home (DTH) television services and other communication and TV services.
The 31st flight in Ariane-5 series, carrying ISRO's INSAT-4B and its co-passenger, Skynet-5A of EADS Astrium, lifted off at 03:33 am Indian Standard Time (IST) from Kourou, French Guyana. About 30 minutes after lift-off, INSAT-4B was placed in the Geosynchronous Transfer Orbit (GTO) in 3-axis stabilised mode. INSAT-4B is now orbiting the earth with a perigee (nearest point to earth) of 243 km and an apogee (farthest point to earth) of 35,876 km and an inclination of 4.52 deg with respect to the equator. The orbital period is about 10 hours 34 minutes.
The Master Control Facility (MCF) at Hassan in Karnataka acquired the first signals from INSAT-4B at 4:02 am IST. The initial checks on the satellite have indicated normal health of the satellite. MCF subsequently issued commands to the satellite to make the earth viewing face to orient towards earth. The calibration of the gyros on board the satellite was also carried out.
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