Countdown begins for India's heaviest communication satellite CMS-03 launch

Sriharikota (Andhra Pradesh) [India], November 2 (ANI): Indian Space Research Organisation (ISRO) on Sunday began the countdown to launch the Indian Navy's GSAT 7R (CMS-03) communication satellite. The indigenously developed satellite is India's heaviest communication satellite to date, weighing around 4,400 kg.
The launch will take place from the second launch pad of Satish Dhawan Space Station in Sriharikota in Andhra Pradesh at 5:26 pm.
"Countdown continuing for #LVM3M5. Systems nominal. Weather favourable. Launch at 17:26 IST," the ISRO wrote on X.

Countdown continuing for #LVM3M5. Systems nominal. Weather favourable. Launch at 17:26 IST.

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🗓️ 2 Nov 2025 (Sunday)
🕔 4:55 PM IST onwards

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— ISRO (@isro) November 2, 2025

The satellite would enhance the Navy's space-based communications and maritime domain awareness capabilities with indigenous, state-of-the-art components developed specifically to meet the Indian Navy's operational requirements.
"This satellite is India's heaviest communication satellite to date, weighing approximately more than 4,400 kg, and includes many indigenous state-of-the-art components developed specifically to meet the Indian Navy's operational requirements," the Indian Navy said.
CMS-03 is a multi-band communication satellite that will provide services over a wide oceanic region, including the Indian landmass, according to ISRO.
The satellite will be launched by the famous LVM3 launch vehicle, which successfully landed India on the lunar South Pole in the Chandrayaan-3 mission. This will be the vehicle's fifth operational flight.
"CMS-03, weighing about 4400kg, will be the heaviest communication satellite to be launched to Geosynchronous Transfer Orbit (GTO) from Indian soil. The previous mission of LVM3 launched the Chandrayaan-3 mission, in which India became the first country to land successfully near the lunar south pole," ISRO said in a statement.
The launch vehicle was assembled earlier and has been on the launch pad since October 26 for pre-launch operations.
The LVM3-M5 launch had eight sequences, with the CMS-03 being separated from the vehicle at an altitude of approximately 179 kilometres at a velocity of around 10 km per second.
The launch vehicle has a height of 43.5 meters, with a total liftoff mass of 642 tonnes. The vehicle uses three stages of propellants to enable the satellite to reach the Geo-synchronous Transfer Orbit (GTO). (ANI)