ISRO Set to Launch Its Heaviest Satellite Yet

A Historic Day for Indian Space Research

In a remarkable milestone for India’s space program, the Indian Space Research Organisation (ISRO) is set to launch its heaviest satellite ever built aboard the LVM3-M5 heavy-lift launch vehicle on Sunday, November 2, 2025. The 4,410 kg CMS-03 communication satellite will be placed into a Geosynchronous Transfer Orbit (GTO), marking a proud leap in India’s self-reliant space capabilities.

Smooth Countdown and Launch Readiness

ISRO officials confirmed that the countdown is progressing smoothly, as the fully assembled rocket stands ready on the second launch pad. “Launch Day for LVM3-M5: India’s heavy-lift rocket to launch CMS-03 today at 17:26 hrs,” the agency shared on social media, reflecting the excitement surrounding this landmark event.

India’s Heaviest Satellite from Home Soil

The CMS-03 will become the heaviest satellite ever launched from Indian soil using an indigenous rocket. Previously, ISRO relied on Arianespace’s Ariane-5 rockets from French Guiana to lift heavier payloads exceeding 4,000 kg. Notably, ISRO’s earlier communication satellite GSAT-11, weighing 5,854 kg, was launched from Kourou, French Guiana, in December 2018.

The Powerhouse: LVM3-M5 “Bahubali”

Standing tall at 43.5 meters, the LVM3-M5 has earned the nickname “Bahubali” for its exceptional lifting capability. The rocket, built for cost-effective heavy payload launches, symbolizes India’s growing autonomy in space technology. LVM3, also known as GSLV Mk III, represents ISRO’s most powerful operational launch vehicle, capable of placing 4,000 kg payloads into GTO and 8,000 kg payloads into Low Earth Orbit (LEO).

Inside the Three-Stage Launch Vehicle

The three-stage configuration of the LVM3 includes:

• Two S200 Solid Rocket Boosters: Developed at the Vikram Sarabhai Space Centre (VSSC) in Thiruvananthapuram, these boosters generate the massive thrust needed for liftoff.
• L110 Liquid Stage: Powered by twin Vikas engines designed at the Liquid Propulsion Systems Centre, this stage ensures steady propulsion during ascent.
• C25 Cryogenic Upper Stage: The advanced cryogenic engine enhances efficiency and enables the rocket to carry heavy payloads to higher orbits.

CMS-03: A Multi-Band Communication Marvel

Though ISRO has not officially confirmed military use, CMS-03 is described as a multi-band communication satellite capable of delivering services across the Indian mainland and surrounding oceanic regions. This satellite is expected to enhance telecommunication, broadcasting, and data services, supporting India’s digital and strategic infrastructure.

Continuing a Legacy of Success

This mission marks the fifth operational flight of the LVM3 series, following the globally celebrated Chandrayaan-3 mission, which made India the first country to land successfully near the lunar south pole in 2023. With CMS-03, ISRO continues its journey of innovation, self-reliance, and international recognition in the space domain.

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Sorit Chaudhary

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