The Indian Space Research Organisation (ISRO) has scheduled the GSLV-F18/NVS-03 mission for 23:51 IST on 30 October 2026. The launch is to take place from the Second Launch Pad at the Satish Dhawan Space Centre (SDSC-SHAR), Sriharikota, Andhra Pradesh. As the launch is scheduled for later tonight, its success and the satellite’s subsequent performance remain unconfirmed.
NVS-03 and NavIC services
NVS-03 is the third satellite in the second-generation Navigation with Indian Constellation (NavIC) series. It is intended to support continuity and reliability of NavIC, whose standalone positioning capability has been weakened by failures of atomic clocks aboard older satellites.
The satellite carries an indigenous Rubidium atomic clock alongside procured atomic clocks. It will add the L1 navigation frequency band to NavIC’s existing L5 and S signals, with the aim of improving compatibility with modern civilian devices.
The previous replacement satellite, NVS-02, was launched in January 2025 but did not reach its intended orbit. A drive signal failed to reach the oxidiser-line pyro valve. For NVS-03, ISRO has made a propulsion-system change: its pyrotechnic valves are to fly already activated and open.
Important Facts for Exams
- Service classes: NavIC offers civilian Standard Positioning Service, interoperable with GNSS, alongside an encrypted Restricted Service for authorised users, including the military.
- Orbit design: NavIC’s constellation places three satellites in geostationary orbit and four in inclined geosynchronous orbit.
- Ground redundancy: NavIC’s Byalalu and Lucknow Navigation Centres jointly provide operational redundancy to support system operations.
