INSAT-4A explained

INSAT 4A
Mission Type:Communications
Operator:INSAT
Website:INSAT 4A
Cospar Id:2005-049A
Satcat:28911
Mission Duration:Planned: 12 years
Achieved:
Spacecraft Bus:I-3K
Manufacturer:ISRO
Dry Mass:1386kg (3,056lb)[1]
Launch Mass:3081kg (6,792lb)
Power:5,922 watts
Dimensions:2.8 x 1.7 x 2.0 m
Launch Date: UTC
Launch Site:Kourou ELA-3
Launch Contractor:Arianespace
Disposal Type:Moved to a graveyard orbit
Deactivated:[2]
Orbit Reference:Geocentric
Orbit Regime:Geostationary
Orbit Period:24 hours
Orbit Slot:83° East (0°N 83°W)
Apsis:gee
Trans Band:12 Ku band
12 C-band
Trans Bandwidth:36 megahertz
Trans Twta:140 & 63 watts
Trans Eirp:51 & 38 dbW

INSAT-4A was the first one in the INSAT-4 Satellites series, providing services in the Ku and C band frequency bands. At the time of launch, it was the heaviest satellite India had produced. The Ku transponders cover the Indian main land and C-Band transponders cover an extended area. It has a dozen Ku transponders and another dozen of C-band transponders. This spacecraft was placed at 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169).[3] [4] [5] [6]

Overview

INSAT-4A was a communication satellite intended for providing high quality television, telecommunication, broadcasting services and was the first satellite to be launched in the INSAT-4 series.

Launch

INSAT-4A was launched by an Ariane 5, produced by Arianespace, on 21 Dec 2005 at 22.33 UTC[7] [8] from Kourou, French Guiana. It was placed into a Geosynchronous Transfer Orbit (GTO), 30 minutes after lift-off in 3-axis stabilized mode, with a perigee of 859 km and an apogee of 36,055 km. Its co-passenger on board was Meteosat-9 of EUMETSAT.

Payload

End Of Life and Replacement

The satellite was placed in the graveyard orbit on 21 October 2019 after almost 14 years in service.[2] A replacement satellite GSAT-30 was launched on 21:05 UTC, 16 January 2020 aboard Ariane 5 VA251.[9] [10]

Notes and References

  1. Web site: Salient features of INSAT-4A . 28 October 2019 . 28 October 2019 . https://web.archive.org/web/20191028121946/https://www.ursc.gov.in/communication/html/insat-4a.jsp . dead .
  2. Web site: Historical satellite position data for INSAT-4A for the month of October 2019 . 28 October 2019.
  3. Web site: Insat 4A, 4B.
  4. Web site: Insat-4A - Isro. 2017-01-29. 2015-09-27. https://web.archive.org/web/20150927183246/http://www.isro.gov.in/Spacecraft/insat-4a. dead.
  5. Web site: SALIENT FEATURES OF INSAT-4A . https://web.archive.org/web/20150915154159/http://www.isac.gov.in/communication/html/insat-4a.jsp . 15 September 2015 . 2020-01-16 . www.ursc.gov.in.
  6. Web site: Space India, October 2005 - March 2006 .
  7. Web site: Ariane: 5 for 5 in 2005, Successful launch of Insat 4A and MSG-2 . 2022-12-20 . Arianespace . en-US.
  8. Web site: 2006-05-07 . INSAT-4A Launched Successfully . 2022-12-20 . 2006-05-07 . https://web.archive.org/web/20060507174609/http://www.isro.org/pressrelease/Dec22_2005.htm . bot: unknown .
  9. Web site: Press Release: India's communication satellite GSAT-30 launched successfully - ISRO. www.isro.gov.in. 2020-01-16. 2020-05-30. https://web.archive.org/web/20200530144810/https://www.isro.gov.in/update/17-jan-2020/press-release-india%E2%80%99s-communication-satellite-gsat-30-launched-successfully. dead.
  10. Web site: Flight VA251 – first Arianespace mission of 2020 a success: EUTELSAT KONNECT and GSAT-30 in orbit. Arianespace. en-US. 2020-01-16.

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