GSAT-19

GSAT-19
Mission type Communications
Operator INSAT
COSPAR ID 2017-031A
SATCAT no. 42747
Website GSAT-19
Mission duration Planned: 10 years[1]
Elapsed: 1 year, 4 months, 7 days
Spacecraft properties
Bus I-3K
Manufacturer ISRO Satellite Centre
Space Applications Centre
Launch mass 3,136 kg (6,914 lb)[1]
Dry mass 1,394 kg (3,073 lb)[1]
Dimensions 2.0 × 1.77 × 3.1 m (6.6 × 5.8 × 10.2 ft)[1]
Power 4,500 watts[1]
Start of mission
Launch date 5 June 2017, 11:58 (2017-06-05UTC11:58) UTC[2]
Rocket GSLV Mk III-D1[3]
Launch site Satish Dhawan SLP
Contractor ISRO
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude 48° E[4]
Perigee 35,470 km (22,040 mi)
Apogee 35,869 km (22,288 mi)
Inclination 0.101 deg
Period 23 hr, 50 min, 10 sec
Epoch 10 June 2017, 02:29 UTC[5]
Transponders
Band
Coverage area India

GSAT-19 is an Indian communications satellite launched by the Indian Space Research Organisation aboard a Geosynchronous Satellite Launch Vehicle Mark III on 5 June 2017.[2]

Satellite and payloads

The satellite will act as a testbed for the modular I-6K satellite bus, carrying experimental technologies such as ion thrusters for manoeuvring and stabilisation, active thermal control using thermal radiators, a miniaturised inertial reference unit, indigenously produced lithium-ion batteries, and C-band traveling-wave-tube amplifiers.[6][7][8]

Rather than traditional transponders, GSAT-19 carries four Ku/Ka-band forward link beams and four Ku/Ka-band return link beams, providing much higher data throughput than India's previous communications satellites.[9][10] It additionally carries a Geostationary Radiation Spectrometer (GRASP) payload, which will "monitor and study the nature of charged particles and the influence of space radiation on satellites and their electronic components".[11]

Orbit raising and station keeping

The satellite was launched aboard the GSLV Mk III-D1 rocket in the evening of 5 June 2017 to a geostationary transfer orbit perigee of 180 km (112 mi). This was followed by a series of orbit raising operations (using an on-board LAM and chemical thrusters[1]) to place the satellite in the intended geostationary orbital slot.

Op # Date/
Time (UTC)		 LAM burn time Height achieved Inclination
achieved		 Orbital period References
ApogeePerigee
16 June 2017
08:33		116 sec35,938 km (22,331 mi)172.77 km (107.35 mi)21.56°10 hr, 30 min[12]
27 June 2017
10:14		5538 sec35,840 km (22,270 mi)10,287 km (6,392 mi)7.02°13 hr, 58 min[13]
39 June 2017
04:25		3469 sec35,875 km (22,292 mi)30,208 km (18,770 mi)0.793°21 hr, 38 min[14]
410 June 2017
02:29		488 sec35,869 km (22,288 mi)35,470 km (22,040 mi)0.101°23 hr, 50 min, 10 sec[5]

References

  1. 1 2 3 4 5 6 "GSLV Mark III-D1 / GSAT-19 Mission" (PDF). Indian Space Research Organisation.
  2. 1 2 Clark, Stephen (5 June 2017). "India's launcher fleet gets an upgrade with successful test flight". Spaceflight Now. Retrieved 6 June 2017.
  3. ↑ Laxmi Ajai, Prasannal (19 May 2017). "Come June 5, ISRO to launch 'game changer' rocket". The Times of India. Times News Network. Retrieved 21 May 2017.
  4. ↑ "Delivered Communication and Navigation Payloads". ISRO/Space Applications Centre. Retrieved 6 June 2017.
  5. 1 2 "The fourth and final orbit raising operation..." Indian Space Research Organisation. 10 June 2017. Retrieved 12 June 2017.
  6. ↑ "Annual Report: 2014-2015" (PDF). Indian Space Research Organisation. 2015. p. 26.
  7. ↑ "First Prototype of ISRO's Semi-Cryogenic Engine To Be Ready By 2016". AA Me, IN. 19 August 2015. Retrieved 26 October 2016.
  8. ↑ "GSat 19". Gunter's Space Page. Retrieved 27 May 2016.
  9. ↑ "Isro's GSAT-19, GSAT-11 satellites: Game changers in communications". The Times of India. Press Trust of India. 5 June 2017. Retrieved 26 June 2017.
  10. ↑ Graham, William (5 June 2017). "GLSV Mark III rocket conducts 'all-up' launch with GSAT-19 satellite". NASASpaceFlight.com. Retrieved 26 June 2017.
  11. ↑ Ramachandran, R. (26 June 2017). "ISRO's Mk III Launched a Little-Known Instrument Called GRASP – This Is What It Does". The Wire. Retrieved 26 June 2017.
  12. ↑ "The first orbit raising operation..." Indian Space Research Organisation. 8 June 2017. Retrieved 12 June 2017.
  13. ↑ "The second orbit raising operation..." Indian Space Research Organisation. 8 June 2017. Retrieved 12 June 2017.
  14. ↑ "The third orbit raising operation..." Indian Space Research Organisation. 10 June 2017. Retrieved 12 June 2017.
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