ISRO Successfully Launches GSLV-D5

GSLV-D5 with Indigenous Cryogenic Stage successfully launches GSAT-14 from SDSC SHAR, Sriharikota.
Sunday, January 5, 2014

Sriharikota: GSLV-D5 is the eighth flight of India's Geosynchronous Satellite Launch Vehicle (GSLV). It is also the fourth developmental flight of GSLV. GSLV-D5 vehicle is configured with its first and second stages similar to the ones flown during earlier GSLV missions. The third stage is the Indigenous Cryogenic Stage. A Cryogenic rocket stage is more efficient and provides more thrust for every kilogram of propellant it burns compared to solid and earth-storable liquid propellant rocket stages. Specific impulse (a measure of the efficiency) achievable with cryogenic propellants (liquid Hydrogen and liquid Oxygen) is much higher compared to earth storable liquid and solid propellants, giving it a substantial payload advantage. The metallic payload fairing with a diameter of 3.4 metre is adopted for GSLV-D5. S-band telemetry and C-band transponders enable GSLV-D5 performance monitoring, tracking, range safety / flight safety and Preliminary Orbit Determination (POD).

GSAT-14 is the twenty third geostationary communication satellite of India built by ISRO. The main objectives of GSAT-14 mission are: i) To augment the In-orbit capacity of Extended C and Ku-band transponders ii) To provide a platform for new experiments.

The payloads of GSAT-14 are:
• Six extended C-band transponders for Indian mainland and island coverage with 36 dBW Edge Of Coverage-Effective Isotropic Radiated Power (EOC-EIRP)
• Six Ku-band transponders covering the mainland India with 51.5 dBW EOC-EIRP
• Two Ka-band Beacons operating at 20.2 GHz and 30.5 GHz to carry out attenuation studies

Some of the new technologies being tested on GSAT-14 are:
• Fiber Optic Gyro
• Active Pixel Sun Sensor
• Ka band beacon propagation studies
• Thermal control coating experiments