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The 24-hour countdown for the launch of implicit 4,000 kg connection outer CMS-03 commenced astatine this spaceport connected Saturday (November 1, 2025), ISRO said.
The outer weighing astir 4,410 kg volition beryllium the heaviest to beryllium launched from the Indian ungraded and into a Geosynchronous Transfer Orbit (GTO), the abstraction bureau said.
The spacecraft volition question onboard a LVM3-M5 rocket, dubbed arsenic 'Bahubali' for its heavylift capability.
The motorboat conveyance has been afloat assembled and integrated with the spacecraft and it has been moved to the 2nd motorboat pad present for taking up pre-launch operations, the Bengaluru-headquartered abstraction bureau said connected Saturday (November 1, 2025).
Later successful a societal media post, ISRO said, "Countdown commences!! Final preparations implicit and the countdown for LVM3-M5 (mission) has officially begun astatine Satish Dhawan Space Centre, Sriharikota".
"All systems are GO arsenic we determination person to liftoff," the abstraction bureau said successful its update.
The 43.5 metre gangly rocket is scheduled for a 5.26 p.m. liftoff connected November 2.
LVM3- (Launch Vehicle Mark-3) is the caller dense assistance motorboat conveyance of ISRO and is utilized for placing 4,000 kg spacecraft successful GTO successful a cost-effective manner, ISRO said.
This 3 signifier motorboat conveyance with 2 coagulated centrifugal strap-ons (S200), a liquid propellant halfway signifier (L110) and a cryogenic signifier (C25) gives ISRO afloat self-reliance successful launching heavier connection satellites that measurement up to 4,000 kg successful GTO.
LVM3- is besides termed arsenic Geosynchronous Satellite Launch Vehicle (GSLV) MkIII.
According to ISRO, the LVM3-M5 is the 5th operational flight. The LVM3 conveyance was developed with wholly indigenised technologies including the C25 cryogenic stage. It has a way grounds of each palmy launches adjacent from the archetypal improvement formation LVM-3 Crew module Atmospheric Re-entry Experiment (CARE) launched successful December 2014.
It is pertinent to notation that for the ambitious Gaganyaan mission, ISRO had planned the Human rated LVM3 rocket arsenic the motorboat vehicle, which is named arsenic HRLV.
The abstraction bureau had antecedently launched its heaviest connection outer GSAT-11 connected December 5, 2018 from Kourou motorboat base, French Guiana by Ariane-5 VA-246 rocket. Weighing astir 5,854 kg, GSAT-11 is the heaviest outer built by ISRO.
Sunday's ngo nonsubjective is that the CMS-03, a multi-band connection satellite, volition supply services implicit a wide oceanic portion including the Indian landmass, the abstraction bureau said.
The LVM3- rocket is susceptible to transportation payload to GTO weighing 4,000 kg and for Low Earth Orbit payloads of 8,000 kg with its almighty cryogenic stage.
The 2 S200 coagulated rocket boosters located connected the sides of the rocket supply the thrust required for assistance off. The S200 boosters are developed astatine Vikram Sarabhai Space Centre successful Thiruvananthapuram.
The 3rd signifier is L110 Liquid Stage and is powered by 2 Vikas engines designed and developed astatine the Liquid Propulsion Systems Centre.
The erstwhile ngo of LVM-3 rocket was the palmy motorboat of Chandrayaan-3 mission, wherein, India became the archetypal state to onshore successfully adjacent the lunar South rod successful 2023.
