Engineering: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: 7 years, 1 month, 13 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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "GSLV Mark III-D1 / GSAT-19 Mission". Indian Space Research Organisation. http://www.isro.gov.in/sites/default/files/flipping_book/GSLV%20Mark%20III%20D1/files/assets/common/downloads/GSLV%20Mark%20III%20D1.pdf. 
  2. ↑ 2.0 2.1 Clark, Stephen (5 June 2017). "India's launcher fleet gets an upgrade with successful test flight". Spaceflight Now. https://spaceflightnow.com/2017/06/05/indias-launcher-fleet-gets-an-upgrade-with-successful-test-flight/. 
  3. ↑ Laxmi Ajai, Prasannal (19 May 2017). "Come June 5, ISRO to launch 'game changer' rocket". The Times of India. Times News Network. http://timesofindia.indiatimes.com/india/isro-all-set-for-indias-most-powerful-launch-vehicle/articleshow/58754518.cms. 
  4. ↑ "Delivered Communication and Navigation Payloads". ISRO/Space Applications Centre. http://www.sac.gov.in/Vyom/dpp.jsp. 
  5. ↑ 5.0 5.1 "The fourth and final orbit raising operation...". Indian Space Research Organisation. 10 June 2017. http://isro.gov.in/update/10-jun-2017/fourth-and-final-orbit-raising-operation-of-gsat-19-satellite-has-been. 
  6. ↑ "Annual Report: 2014-2015". Indian Space Research Organisation. 2015. p. 26. http://www.isro.gov.in/sites/default/files/pdf/AR2014-15.pdf. 
  7. ↑ "First Prototype of ISRO's Semi-Cryogenic Engine To Be Ready By 2016". AA Me, IN. 19 August 2015. http://www.aame.in/2015/08/first-prototype-of-isro-semi-cryogenic.html. 
  8. ↑ "GSat 19". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/gsat-19.htm. 
  9. ↑ "Isro's GSAT-19, GSAT-11 satellites: Game changers in communications". The Times of India. Press Trust of India. 5 June 2017. http://timesofindia.indiatimes.com/india/isros-gsat-19-11-satellites-a-revolution-in-communications/articleshow/58983052.cms. 
  10. ↑ Graham, William (5 June 2017). "GLSV Mark III rocket conducts 'all-up' launch with GSAT-19 satellite". NASASpaceFlight.com. https://www.nasaspaceflight.com/2017/06/glsv-mark-iii-rocket-launch-gsat-19-satellite/. 
  11. ↑ Ramachandran, R. (26 June 2017). "ISRO's Mk III Launched a Little-Known Instrument Called GRASP – This Is What It Does". The Wire. https://thewire.in/151354/grasp-isro-mk3-radiation-gsat-20/. 
  12. ↑ "The first orbit raising operation...". Indian Space Research Organisation. 8 June 2017. http://isro.gov.in/update/08-jun-2017/first-orbit-raising-operation-of-gsat-19-satellite-has-been-successfully-carried. 
  13. ↑ "The second orbit raising operation...". Indian Space Research Organisation. 8 June 2017. http://isro.gov.in/update/08-jun-2017/second-orbit-raising-operation-of-gsat-19-satellite-has-been-successfully-carried. 
  14. ↑ "The third orbit raising operation...". Indian Space Research Organisation. 10 June 2017. http://isro.gov.in/update/10-jun-2017/third-orbit-raising-operation-of-gsat-19-satellite-has-been-successfully-carried. 



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