GSAT

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About: the Indian telecommunications and broadcasting satellites

For other uses, see Galileo navigation system.

the algorithm for propositional Boolean satisfiability

Template:Infobox spacecraft class The GSAT (Geostationary Satellite)[1] satellites are India's indigenously developed communications satellites, used for digital audio, data and video broadcasting. As of 5 December 2018, 20 GSAT satellites of ISRO have been launched out of which 14 satellites are in service.

History

The GSAT series of geosynchronous satellites is a system developed by ISRO with an objective to make India self-reliant in broadcasting services. The repertoire of 10 GSAT satellites, a total of 168 transponders (out of which 95 transponders are leased out to provide services to the broadcasters) in the C, Extended C and Ku-bands provides services to telecommunications, television broadcasting, weather forecasting, disaster warning and search and rescue operations.

List of active satellites

This is a list of GSAT current satellites with their outcome.

GSAT Satellites In Service
Satellite Longitude Date of launch Launch vehicle Lift-off mass Status Notes
GSAT series INSAT series Known as
GSAT-6 INSAT-4E 83° East 27 August 2015 Template:Flagicon GSLV Mk II D6 Template:Convert Template:Yes A multi-media mobile satellite system; will offer a Satellite Digital Multimedia Broadcasting (S-DMB) service, via mobile phones and mobile video/audio receivers for vehicles; Can also be utilized for strategic and social applications.
GSAT-7 INSAT-4F[2] Rukmani 74° East 30 August 2013 Template:Flagicon Ariane 5 ECA VA-215 Template:Convert Template:Yes According to defense experts, to enable the Indian Navy to acquire blue water capabilities and need not depend on foreign satellites like Inmarsat, which provide communication services to its ships.
GSAT-7A - Angry Bird 19 December 2018 Template:Flagicon GSLV Mk II F11

Template:Convert

Template:Yes GSAT-7A is an advanced military communications satellite meant exclusively for the Indian Air Force.
GSAT-8 INSAT-4G GramSat 8[3] 55° East 20 May 2011 Template:Flagicon Ariane 5 ECA VA-202 Template:Convert Template:Yes To augment the capacity in the INSAT system; The GAGAN payload provides the Satellite Based Augmentation System (SBAS), through which the accuracy of the positioning information obtained from the IRNSS Satellites is improved by a network of ground-based receivers and made available to the users in the country through the geostationary satellites.
GSAT-9 - South Asia Satellite 48° East 5 May 2017 Template:Flagicon GSLV Mk II F09 Template:Convert Template:Yes Carried GAGAN navigation payload, a regional navigational services by NAVIC, a navigational system developed by India, that provides navigational services to the security forces and air traffic control organizations.
GSAT-10 - 83° East 29 September 2012[4] Template:Flagicon Ariane 5 ECA VA-209 Template:Convert Template:Yes To augment telecommunication, Direct-To-Home and radio navigation services.
GSAT-11 - 74° East 4 December 2018 Template:Flagicon Ariane 5 ECA VA-246 5854 kg

(12,906 lb)

Template:Yes Aimed at providing advanced telecom and DTH services in the country. Heaviest satellite build by India.
GSAT-12 - GramSat 12[5] 83° East 15 July 2011 Template:Flagicon PSLV-XL C17 Template:Convert Template:Yes Replacement of the INSAT-3B; to provide services like tele-education, tele-medicine, disaster management support and satellite internet access. Only GSAT satellite to be launched by PSLV.
GSAT-14 - 75° East 5 January 2014 Template:Flagicon GSLV Mk.II D5 Template:Convert Template:Yes To replace the GSAT-3 satellite; launched by a GSLV Mk.II, which incorporated an Indian-built cryogenic engine on the third stage.
GSAT-15 - 93.5° East 10 November 2015 Template:Flagicon Ariane 5 ECA VA-227 Template:Convert Template:Yes Similar to GSAT-10 satellite; to augment the capacity of transponders to provide more bandwidth for Direct-to-Home television and VSAT services.
GSAT-16 - 55° East 6 December 2014 Template:Flagicon Ariane 5 ECA VA-221 Template:Convert Template:Yes[6] The communication payloads provide a combination of total 48 transponders across the three frequency bands (24-Normal C, 12-Extended-C and 12 in Ku-band) along with a Ku-band beacon transmitter, which is the highest for an Indian satellite. The spacecraft will be Co-located with GSAT-8 at 55 deg E.
GSAT-17 - 93.5° East 28 June 2017 Template:Flagicon Ariane 5 ECA VA-238 3,477 kg (7,551 lb) Template:Yes[7] Payload includes 24 C-band, 2 lower C-band, 12 upper C-band, 2 CxS (C-band up/S-band down), and 1 SxC (S-band up/C-band down) transponders as well as a dedicated transponder for data relay (DRT) and search-and-rescue (SAR) services.
GSAT-18 - 74° East 5 October 2016 Template:Flagicon Ariane 5 ECA

VA-231

Template:Convert Template:Yes[7] to provide services in Normal C-band, Upper Extended C-band and Ku-bands of the frequency spectrum.[8]
GSAT-19 - 48° East 5 June 2017 Template:Flagicon GSLV Mk III D1 Template:Convert Template:Yes[9] Maiden (developmental) flight of GSLV Mark III
GSAT-29 - 55° East 14 November 2018 Template:Flagicon GSLV Mk III D2 Template:Cvt Template:Yes[10] Second developmental flight of GSLV Mark III
GSAT-30 83° East 17 January 2020 Template:Flagicon Ariane 5 ECA VA-251 Template:Cvt Template:Yes[11] Replacement satellite for INSAT-4A
GSAT-31 48° East 6 February 2019 Template:Flagicon Ariane 5 ECA VA-247 Template:Cvt Template:Yes[12]

List of upcoming GSAT satellites

GSAT Satellites Planned
Satellite Longitude Date of launch Launch vehicle Lift-off mass Status Notes
GSAT series INSAT series Known as
GSAT-7B - 20XX Template:Flagicon GSLV Mk II F? Template:Planned
GSAT-7C - 20XX Template:Flagicon GSLV Mk II F? Template:Planned
GSAT-7R - 20XX Template:Flagicon GSLV Mk II F? Template:Planned Replacement for GSAT-7 Rukmini[13]
GSAT-20 - 202X

(Planned)

Template:Flagicon GSLV Mk III 5,300 kg (11,684 lb) Template:Planned[14]
GSAT-22 - 202X (planned) Template:Flagicon GSLV Mk III Template:Planned[15]
GSAT-23 - 202X (planned) Template:Flagicon GSLV Mk III Template:Planned[15]
GSAT-24 - 2021 (planned) Template:Flagicon Ariane 5 ECA Template:Planned[15]
GSAT-32 2022 Template:Flagicon GSLV Mk II Template:Planned Replacement of GSAT – 6A.

List of defunct satellites

GSAT satellites decommissioned/failed/cancelled
Satellite Longitude Date of launch Launch vehicle Lift-off mass Status Notes
GSAT series INSAT series Known as
GSAT-1 - GramSat 1[16] 73° West (2000)
99° West (2000–2006)
76.85° West (2006–2009) 		18 April 2001 Template:Flagicon GSLV Mk I D1 Template:Convert Template:No Envisaged as a technology demonstrator; Failed to achieve its target orbit, which prevented it from fulfilling its primary communications mission.
GSAT-2 - GramSat 2[17] 47.95° East 8 May 2003 Template:Flagicon GSLV Mk I D2 Template:Convert Template:Partial Experimental communication satellite on board the second developmental test flight of India's GSLV.
GSAT-3 - EduSat 74° East 20 September 2004 Template:Flagicon GSLV Mk I F01 Template:Convert Template:Partial Built exclusively to serve the educational sector. It was mainly intended to meet the demand for an interactive satellite-based distance education system for the country.
GSAT-4 - HealthSat 82° East 15 April 2010 Template:Flagicon GSLV Mk II D3 Template:Convert Template:No Experimental communication and navigation satellite; maiden flight of the GSLV Mk.II rocket.
GSAT-5 INSAT-4D[18] Template:Flagicon GSLV Mk II Template:Convert Template:No Rebuilt as the GSAT-5P.
GSAT-5P - 55° East 25 December 2010 Template:Flagicon GSLV Mk I F06 Template:Convert Template:No As a replacement for INSAT-3E.
GSAT-6A - 29 March 2018 Template:Flagicon GSLV Mk II F08 Template:Convert Template:No Communication with the satellite was lost after the second orbit raising manoeuvre. Efforts are on to re-establish link but at this point it remains incommunicado.[19]

See also

Template:Clear

References

  1. ↑ ISRO GeoStationary Satellites. isro.org.
  2. ↑ GSAT 7. NASA(16 August 2013). Retrieved 6 January 2014.
  3. ↑ GSAT 8. NASA(16 August 2013). Retrieved 6 January 2014.
  4. ↑ GSAT 10. NASA(16 August 2013). Retrieved 6 January 2014.
  5. ↑ GSAT 12. NASA(16 August 2013). Retrieved 6 January 2014.
  6. ↑ Ariane 5 delivers DIRECTV-14 and GSAT-16 to orbit on Arianespace's latest mission success. Retrieved 7 December 2014.
  7. ↑ 7.0 7.1 Annual Report 2015-2016. Indian Space Research Organisation(December 2015).
  8. ↑ GSAT-18 launched successfully on board Ariane-5 from Kourou in French Guiana(2016-10-06). Retrieved 2016-10-06.
  9. ↑ Now, ISRO successfully puts GSAT-19 satellite in orbit with GSLV Mk-III. Retrieved 5 June 2017.
  10. ↑ ISRO successfully launches the GSAT-29 satellite from Satish Dhawan Space Center in Sriharikota on Wednesday. Bangalore Mirror. 14 November 2018.
  11. ↑ India’s communication satellite GSAT-30 launched successfully. ISRO. Retrieved 17 January 2020.
  12. ↑ India's 40th Communication Satellite, GSAT-31, Launched. NDTV. Retrieved 6 February 2019.
  13. ↑ Navy to buy Rs 1,589 crore satellite from ISRO. Economic Times. Retrieved 18 July 2019.
  14. ↑ GSat 20. Gunter's Space Page(2 June 2017). Retrieved 2 June 2017.
  15. ↑ 15.0 15.1 15.2 GSAT 22/23/24. Indian Defense News(25 April 2017). Retrieved 16 February 2018.
  16. ↑ GSAT 1. NASA(16 August 2013). Retrieved 6 January 2014.
  17. ↑ GSAT 2. NASA(16 August 2013). Retrieved 6 January 2014.
  18. ↑ GSat 5 (Insat 4D). Gunter's Space Page(29 March 2017). Retrieved 22 May 2017.
  19. ↑ https://www.isro.gov.in/update/01-apr-2018/second-orbit-raising-operation-of-gsat-6a-satellite-has-been-successfully-carried

Template:GSAT Satellites Template:INSAT Satellites Template:Indian spacecraft Template:Indian space programme

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