GSAT-9/ South Asia Satellite
GSAT stands for Geostationary Satellite which is a set of communication satellites developed by India and used primarily for audio and video broadcasting.
The purpose of GSAT-9 was to serve the satellite needs of the South Asian Association for Regional Cooperation (SAARC) countries.
GSAT-9 was launched from Second Launch Pad (SLP) at Satish Dhawan Space Centre, Sriharikota, India on May 5, 2017. It was placed in Geosynchronous Orbit at 0.0413 degrees inclination and 48 degrees East longitude. It made use of the I-2K Bus system. With lift-off mass 2230 kg, the satellite was launched by the vehicle GSLV-F09.
Read: GSAT - 31
The propulsion system consisted of eight 10N chemical thrusters for orbit-raising and 440N Liquid Apogee Motor (LAM). For Attitude Determination and Control System (ADCS), it uses magnetic torques, thrusters and momentum wheels. It also made use of four 18mN plasma thrusters which assists in station keeping. The satellite will be powered by a primary source consisting of two deployable solar arrays capable of providing 3,500 watts and a secondary source consisting of two 90 Ah lithium-ion batteries.
GSAT-9 also carried twelve high power transponders working on Ku-band. This is achieved by using a 2m x 2.2m Ku-band reflector and a 1.4m Ku-band reflector on each side of the satellite. This system will be primarily used for TV broadcast services including DTH, and banking which will cover South Asia, including India, Bangladesh, Bhutan, Maldives, Nepal, Sri Lanka and Afghanistan. GSAT-9 will also act as an addition to the GAGAN system to provide redundancy in case any of the satellites encounter problems with the communication.
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| GSLV-F09 (Source-ISRO) |
The propulsion system consisted of eight 10N chemical thrusters for orbit-raising and 440N Liquid Apogee Motor (LAM). For Attitude Determination and Control System (ADCS), it uses magnetic torques, thrusters and momentum wheels. It also made use of four 18mN plasma thrusters which assists in station keeping. The satellite will be powered by a primary source consisting of two deployable solar arrays capable of providing 3,500 watts and a secondary source consisting of two 90 Ah lithium-ion batteries.
GSAT-9 also carried twelve high power transponders working on Ku-band. This is achieved by using a 2m x 2.2m Ku-band reflector and a 1.4m Ku-band reflector on each side of the satellite. This system will be primarily used for TV broadcast services including DTH, and banking which will cover South Asia, including India, Bangladesh, Bhutan, Maldives, Nepal, Sri Lanka and Afghanistan. GSAT-9 will also act as an addition to the GAGAN system to provide redundancy in case any of the satellites encounter problems with the communication.
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| GSAT-9 Undergoing some Test (Source-ISRO) |
Also Read: YOUTHSAT
Summary:
Launch – May 5, 2017, 4:57 pm IST
Payload mass – 2230 kg (at take-off), 976 kg (Dry mass)
Orbit – GEO – 35,802 km apogee and 35,769 km perigee
Inclination – 0.0413 degrees with 48 Degrees East Longitude
Launch site – Satish Dhawan Space Center, Sriharikota, India
Launch vehicle – GSLV Mk II-F09
Mission life – 12 years (planned)
Application--Communication
Power--3500 Watts
Owner--ISRO
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