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INSAT Satellite bus

The INSAT Satellite Bus is a series of satellite buses that have been manufactured by the Indian Space Research Organisation and marketed by NewSpace India Limited. It consist of five different versions; I-1K, I-2K, I-3K, I-4K& I-6K.

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The INSAT Satellite Bus is a series of satellite buses that have been manufactured by the Indian Space Research Organisation and marketed by NewSpace India Limited. It consist of five different versions; I-1K, I-2K, I-3K, I-4K& I-6K.1

I-1K

I-1K (also referred to as INSAT-1000) is a satellite bus developed by the Indian Space Research Organisation (ISRO) and marketed by Antrix Corporation.2 The I-1K bus is designed to be compatible with lightweight geostationary satellites and is commonly used for meteorological satellites.The IRS or Indian Remote Sensing Satellite bus are also built on I-1K.1

Design

  • The I-1K bus can be used for satellites in the lightweight category, with a launch mass between 1,050 and 1,100 kilograms (2,310 and 2,430 lb).
  • Its dimensions are 1.505 m × 1.476 m × 1.530 m (4.94 ft × 4.84 ft × 5.02 ft).
  • I-1K's dry mass is 500 kg (1,100 lb) and can support payloads of 100 kg (220 lb).
  • Its power systems can supply between 500 and 1000 watts.3
  • The average transponder life is 7 years which can be extended up to 12 years.

List of satellites launched using I-1K platform

I-2K

I-2K is a satellite bus developed by Indian Space Research Organisation (ISRO), and marketed by Antrix Corporation.6 It is a standard bus for 2,000 kg class satellites; the 'I' in I-2K stands for INSAT, a group of communication satellites developed and launched by ISRO. The satellite buses developed by ISRO are specifically developed for small and medium weight satellites. I-2K spacecraft bus can supply DC power up to 3000 watts.7 I-2K platform is targeted towards satellites in liftoff mass in range of 1500–2500 kg.8

Features of I-2K

  • Launch Mass: 2,000–2,300 kg (4,400–5,100 lb).
  • Dimensions: 1.65 * 1.53m in plan & 3.0m in height.
  • Dry Mass: 600–950 kg (1,320–2,090 lb).
  • Payload Mass: 160–200 kg (350–440 lb).
  • Total Power: 2800 W.
  • Payload Power: 2400 W.
  • Transponder: 12 - 18.
  • Mission Life: 12 - 15 Years.9

List of satellites launched using I-2K platform

I-3K

I-3K or the INSAT 3000 is a satellite bus developed by Indian Space Research Organisation (ISRO), and marketed by Antrix Corporation and New Space India Ltd.1314 It is the standard bus for 3,000-kg class satellites; the 'I' in I-3K stands for INSAT, a group of communication satellites developed and launched by ISRO. The I-3K bus can supply DC power up to 6500 watts, and is suitable for satellites with lift-off mass in range of 3,000-3,400 kg.151617

List of satellites launched using I-3K bus

I-4K

I-4K is a satellite bus being developed by the Indian Space Research Organisation (ISRO).2223 It will be a standard bus for 4,000–6,500 kg (8,800–14,300 lb) class communication satellites.24 The I in I-4K stands for INSAT, a group of communication satellites developed and launched by ISRO. The I-4K spacecraft bus can supply DC power of 10 to 15 kilowatts.2225

List of satellites being developed with I-4K bus

I-6K

I-6K is a Satellite bus developed by Indian Space Research Organisation (ISRO)26 It will be a standard bus for 4,000–6,500 kg (8,800–14,300 lb) class communication satellites;27 the I in I-6K stands for INSAT and 6 signifies that it can support satellites up to 6,000 kg in weight. The I-6K spacecraft bus can supply DC power of 10 to 15 kilowatts.

See also

See also

References

References

  1. "Communication Satellite Platform | NSIL". www.nsilindia.co.in. Retrieved 2025-08-24.
  2. "Spacecraft Systems and Subsystems". Antrix Corporation. 2010. Archived from the original on February 20, 2014. Retrieved February 7, 2014.
  3. "INSAT 1000 spacecraft bus" (PDF). Antrix Corporation. Archived from the original (PDF) on September 23, 2015. Retrieved December 30, 2013.
  4. "ISRO: I-1K (I-1000) Bus". Skyrocket.de. Retrieved December 30, 2013.
  5. "Mars Orbiter Spacecraft". ISRO. January 2014. Retrieved November 6, 2013.
  6. "Antrix Corporation Ltd - Satellites > Spacecraft Systems & Sub Systems". Archived from the original on 2014-02-20. Retrieved 2013-12-19.
  7. "SPACECRAFT SYSTEMS AND SUB SYSTEMS". Antrix Corporation. Archived from the original on February 20, 2014. Retrieved December 19, 2013.
  8. "Future Programmes". ISRO. Retrieved December 19, 2013.
  9. "INSAT 2000 spacecraft bus" (PDF). Antrix Corporation. p. 2. Archived from the original (PDF) on September 23, 2015. Retrieved December 19, 2013.
  10. "The Indian GSAT Satellites" (PDF). ISRO. p. 5. Retrieved December 19, 2013.
  11. "ISRO: I-2K (I-2000) Bus". skyrocket.de. Retrieved December 19, 2013.
  12. "ISRO: GSAT-31". ISRO. Archived from the original on November 10, 2019. Retrieved February 6, 2019.
  13. "Communication Satellite Platform | NSIL". nsilindia.co.in. Retrieved 2020-01-17.
  14. "Antrix Corporation Ltd - Satellites > Spacecraft Systems & Sub Systems". Archived from the original on 2014-02-20. Retrieved 2014-01-05.
  15. "INSAT 3000 Spacecraft Bus" (PDF). Archived from the original (PDF) on 2015-09-23. Retrieved 2014-01-05.
  16. "SPACECRAFT SYSTEMS AND SUB SYSTEMS". Antrix - ISRO. Archived from the original on 20 February 2014. Retrieved 5 January 2014.
  17. "Constrained cooperation". Frontline. 17 July 2004. Retrieved 5 January 2014.
  18. "ISRO: I-3K (I-3000) Bus". Space Skyrocket. Retrieved 5 January 2014.
  19. "EADS Astrium-ISRO alliance sealed First contract with Eutelsat for W2M satellite". Space Ref. 20 February 2006. Retrieved 5 January 2014.
  20. "India's GSAT-10 Continues Checkout". Space Ref. 17 August 2012. Archived from the original on 15 March 2016. Retrieved 5 January 2014.
  21. "Chandrayaan-3 Landing Brochure" (PDF). ISRO. Retrieved February 23, 2025.
  22. Indian Space Research Organisation - Current Programmes
  23. GSAT-11 Archived 2014-01-07 at the Wayback Machine
  24. ISRO: I-3K (I-3000) Bus
  25. "Outcome Budget 2011-2012" (PDF). Archived from the original (PDF) on 2012-06-17. Retrieved 2014-02-07.
  26. "GSAT-11 Mission - ISRO". www.isro.gov.in. Archived from the original on 2019-07-13. Retrieved 2018-12-04.
  27. "ISRO: I-6K (I-6000) Bus". space.skyrocket.de.
External links