Isro launches NVS-03 satellite aboard GSLV-F18 to strengthen navigation system
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The Indian Space Research Organisation (Isro) on Friday night successfully launched its next-generation navigation satellite NVS-03 aboard the GSLV-F18 rocket, giving a boost to India’s indigenous satellite navigation system NavIC. The satellite was placed in its designated Geosynchronous Transfer Orbit (GTO) after the rocket lifted off from the Second Launch Pad at the Satish Dhawan Space Centre in Sriharikota at 11:51 pm on October 30.
The mission marks the 20th flight of India’s Geosynchronous Satellite Launch Vehicle (GSLV) and Isro’s third space launch of 2026. The 50-metre-tall rocket carried the 2,232-kg NVS-03 satellite, which separated from the launch vehicle roughly 18 minutes after liftoff following the successful performance of all three stages, including the cryogenic upper stage. “The GSLV F18 vehicle has successfully injected the NVS-03 satellite into its designated injection orbit. The GSLV F18-NVS03 mission has been successfully accomplished,” Isro said after the launch.
What NVS-03 brings to NavIC
NVS-03 is the third satellite in Isro’s second-generation navigation satellite series, which is aimed at ensuring continuity of navigation services under the Indian Regional Navigation Satellite System, or NavIC. The system is India’s independent regional positioning, navigation and timing service and is designed to cover the Indian landmass and an area extending around 1,500 km beyond the country’s geopolitical boundaries.
The satellite carries an indigenous atomic clock along with procured atomic clocks. Precise timing is fundamental to satellite navigation because navigation receivers determine their position by calculating the time taken for signals to travel between satellites and the receiver. NVS-03 also carries the L1 navigation signal in addition to the existing L5 and S-band signals. The addition of L1 is significant because the frequency is widely supported by civilian and consumer navigation equipment, including smartphones and other location-enabled devices. It could therefore improve NavIC’s compatibility with modern receivers and expand its potential civilian and commercial applications.
The satellite was injected into a GTO with a targeted perigee of around 170 km and an apogee of 37,023 km. It will subsequently use its onboard propulsion system to raise its orbit and reach its final geosynchronous position at 32.5 degrees East. The satellite is expected to undergo in-orbit checks before being commissioned for navigation services.
The launch also assumes significance for the current NavIC constellation. The system had been operating with fewer satellites than the minimum required for standalone positioning after NVS-02, launched in January 2025, failed to complete its orbit-raising manoeuvres. With NVS-03, Isro has moved to strengthen the constellation and improve continuity and reliability of positioning, navigation and timing services.
The NVS-03 mission is part of Isro’s plan to deploy five second-generation navigation satellites, NVS-01 to NVS-05. NVS-01, launched in May 2023, was the first satellite in the series to carry an indigenous atomic clock. The successful launch comes as India is also seeking greater reliance on domestic positioning and timing infrastructure. NavIC is intended to reduce dependence on foreign systems such as the US Global Positioning System (GPS), Russia’s GLONASS, Europe’s Galileo and China’s BeiDou for strategic, civilian and commercial applications.