GSAT-19

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GSAT-19
Render of GSAT-19 in deployed configuration.png
Render of GSAT-19
Mission typeCommunications
OperatorINSAT
COSPAR ID2017-031A
SATCAT no.42747
WebsiteGSAT-19
Mission durationPlanned: 10 years[1]
Elapsed: 4 years, 8 months, 27 days
Spacecraft properties
BusI-3K
ManufacturerISRO Satellite Centre
Space Applications Centre
Launch mass3,136 kg (6,914 lb)[1]
Dry mass1,394 kg (3,073 lb)[1]
Dimensions2.0 × 1.77 × 3.1 m (6.6 × 5.8 × 10.2 ft)[1]
Power4,500 watts[1]
Start of mission
Launch date5 June 2017, 11:58 (2017-06-05UTC11:58) UTC[2]
RocketGSLV Mark III-D1[3]
Launch siteSatish Dhawan SLP
ContractorISRO
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Longitude48° E[4]
Perigee altitude35,470 km (22,040 mi)
Apogee altitude35,869 km (22,288 mi)
Inclination0.101 deg
Period23 hr, 50 min, 10 sec
Epoch10 June 2017, 02:29 UTC[5]
Transponders
Band
  • 4 × Ku/Ka forward links
  • 4 × Ku/Ka return links
Coverage areaIndia
← GSAT-9
GSAT-17 →
 

GSAT-19 is an Indian communications satellite launched by the Indian Space Research Organisation aboard a GSLV 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
Apogee Perigee
1 6 June 2017
08:33		 116 s 35,938 km (22,331 mi) 172.77 km (107.35 mi) 21.56° 10 h, 30 min [12]
2 7 June 2017
10:14		 5538 s 35,840 km (22,270 mi) 10,287 km (6,392 mi) 7.02° 13 h, 58 min [13]
3 9 June 2017
04:25		 3469 s 35,875 km (22,292 mi) 30,208 km (18,770 mi) 0.793° 21 h, 38 min [14]
4 10 June 2017
02:29		 488 s 35,869 km (22,288 mi) 35,470 km (22,040 mi) 0.101° 23 h, 50 min, 10 s [5]

References[]

  1. ^ a b c d e f "GSLV Mark III-D1 / GSAT-19 Mission" (PDF). Indian Space Research Organisation.
  2. ^ a b 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. ^ a b "The fourth and final orbit raising operation..." Indian Space Research Organisation. 10 June 2017. Archived from the original on 13 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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