Engineering:GSAT-7R

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GSAT-7R
LVM3-M5 equipped with GSAT-7R, being transferred to the Second Launch Pad
Mission typeCommunication
OperatorIndian Navy
WebsiteCMS-03
Mission durationPlanned: 15 years[1]
Elapsed: 5 months, 7 days
Spacecraft properties
ManufacturerU. R. Rao Satellite Centre[1]
Launch mass4,410 kilograms (9,720 lb)
Start of mission
Launch date2 November 2025, 11:56 (2025-11-02UTC11:56Z) UTC
RocketLVM3-M5
Launch siteSatish Dhawan Space Centre, Sriharikota
Entered service2 November 2025[1]
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
← CMS-02
 
← GSAT-20
GSAT-32 →

GSAT-7R (also known as CMS-03) is a multi-band communication satellite developed by ISRO for the Indian Navy. The satellite is meant to replace the existing and operational GSAT-7.

Satellite

The satellite, weighing 4,410 kilograms (9,720 lb),[2][1] is meant to transmit voice, video and data among the naval ships, submarines, aircraft and Maritime Operation Centres[1] of the Indian Navy deployed across the Indian Ocean Region, covering up to 2,000 km from India's coastline.[3]

The satellite employs advanced payloads in multiple frequency bands, including UHF, S, C and Ku bands.[3] It is also equipped with indigenous components like a 1,200 litre propulsion tank and collapsible antenna systems. It also has a planned lifespan of 15 years.[1]

The contract for the ₹1,589 crore (Template:INRConvert/HistoricalRate/Formatted) satellite project was signed in 11 June 2019 between the Indian Navy and the ISRO.[4][5]

History

During the time of contract signing in 2019, the projected launch date of the satellite was expected between 2020[4] and 2022.[5]By August 2025, the delivery timeline had slipped by few years to November 2025.[6][7] By 23 October, the launch date was scheduled on 2 November.[8] The vehicle performance of LMV3-M5 had been enhanced by 10% to accommodate the CMS-03 satellite which is heavier than its payload capacity of 4 tonnes for GTO orbits.[1]

The satellite assembly and integration with launch vehicle has been completed by early October 2025. The launch vehicle was moved to the launchpad on 26 October and pre-launch procedures were initiated thereafter. It is the heaviest satellite to be launched to the Geostationary Transfer Orbit orbit from India till date.[9][10] A pre flight inspection fixed problems in the fuel control systems that plagued the NVS-02 satellite which used a similar spacecraft bus.[11][12]

On 2 November 2025, at 5:26 pm IST,[2] ISRO successfully placed the CMS-03 satellite into the desired orbit through the LVM3-M5 rocket from the Second Launch Pad[1] of the Satish Dhawan Space Centre, Sriharikota.[13][14] The mission featured an experiment, re-ignition of the cryogenic upper stage. The satellite was separated from the launch vehicle at around 16 minutes in sub-GTO orbit. from launch with a perigee of 26,700 km.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "Gsat-7R: Isro launches heaviest communication satellite from India, Navy set to get boost". The Times of India. 2025-11-03. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/gsat-7r-isro-launches-heaviest-commsat-from-india-navy-set-to-get-boost/articleshow/125044028.cms. 
  2. ↑ 2.0 2.1 "Countdown begins for launch of ISRO’s heaviest communication satellite CMS-03 for military on November 2" (in en-IN). The Hindu. PTI. 2025-11-01. ISSN 0971-751X. https://www.thehindu.com/sci-tech/science/countdown-begins-for-launch-of-isros-heaviest-communication-satellite-cms-03-for-military-on-november-2/article70230682.ece. 
  3. ↑ 3.0 3.1 Singh, Abhinav (2025-10-21). "CMS-02 satellite launch likely in November. Why this is a major upgrade for Indian Navy's operations, maritime defence" (in en). https://www.theweek.in/news/defence/2025/10/21/cms-02-satellite-launch-likely-in-november-why-this-is-a-major-upgrade-for-indian-navys-operations-maritime-defence.html. 
  4. ↑ 4.0 4.1 Pubby, Manu (2019-07-18). "Navy to buy Rs 1,589 crore satellite from ISRO". The Economic Times. ISSN 0013-0389. https://economictimes.indiatimes.com/news/defence/navy-to-buy-rs-1589-crore-satellite-from-isro/articleshow/70283927.cms. 
  5. ↑ 5.0 5.1 "Isro to build 2nd dedicated satellite for Navy to interlink warships, aircraft". The Times of India. 2019-07-21. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/isro-to-build-2nd-dedicated-satellite-for-navy-to-interlink-warships-aircraft/articleshow/70310935.cms. 
  6. ↑ "ISRO to Launch Spy Satellites GSAT-7R and TDS by Year-End, Strengthening Indian Navy’s Communication and Surveillance Capabilities". 2025-08-20. https://indianmasterminds.com/news/isro-to-launch-spy-satellites-gsat-7r-and-tds-by-year-end-strengthening-indian-navys-communication-and-surveillance-capabilities-138482/. 
  7. ↑ Ray, Kalyan (2025-09-11). "Indian Navy to operationalise new info centre in Gurugram today" (in en). https://www.deccanherald.com/india/indian-navy-to-operationalise-new-info-centre-in-gurugram-today-3723886. 
  8. ↑ "LVM-3 to launch CMS-03 on November 2; Nisar to begin operations soon". The Times of India. 2025-10-23. ISSN 0971-8257. https://timesofindia.indiatimes.com/science/lvm-3-to-launch-cms-03-on-november-2-nisar-to-begin-operations-soon/articleshow/124758812.cms. 
  9. ↑ "LVM-3, set to launch satellite for Navy on November 2, moves to launchpad". The Times of India. 2025-10-26. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/lvm-3-set-to-launch-satellite-for-navy-on-november-2-moves-to-launchpad/articleshow/124829075.cms. 
  10. ↑ "Satellite for armed forces to be launched next week" (in en-IN). The Hindu. 2025-10-26. ISSN 0971-751X. https://www.thehindu.com/sci-tech/science/isro-to-launch-military-communications-satellite-cms-03-on-november-2/article70205060.ece. 
  11. ↑ Science Desk, India Today (2026-02-25). "A year after NVS-02 satellite's failure, Isro explains what went wrong in space" (in en). https://www.indiatoday.in/science/story/nvs-02-satellite-failure-reason-isro-explains-lvm-3-mission-2874191-2026-02-25. 
  12. ↑ "NVS-02 Spacecraft: On-Orbit Observations and Apex Committee Recommendations". https://www.isro.gov.in/NVS-02-Spacecraft-On-Orbit-Observations.html. 
  13. ↑ "ISRO scripts history as ‘Bahubali’ rocket injects heaviest satellite in orbit" (in en-IN). The Hindu. PTI. 2025-11-02. ISSN 0971-751X. https://www.thehindu.com/sci-tech/science/isros-lvm3-m5-rocket-with-heaviest-communication-satellite-lifts-off/article70232624.ece. 
  14. ↑ "ISRO Rocket Launch Today Live Updates: India’s heaviest communication satellite CMS-03 successfully placed in intended orbit, mission successfully accomplished" (in en). 2025-11-02. https://indianexpress.com/article/india/isro-rocket-launch-today-live-updates-heaviest-communication-satellite-cms-03-liftoff-sriharikota-lvm3-10341199/. 




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