The Indian Space Research Organisation (ISRO) is scheduled to launch the NVS-03 navigation satellite on October 30 to strengthen India’s indigenous navigation system, NavIC. The mission will introduce a significant change in satellite operations following the failure of its predecessor, NVS-02, to reach its intended final orbit.
According to reports, ISRO plans to keep the satellite’s pyro valves, which control the flow of fuel and oxidiser, open before launch. This marks a departure from the conventional procedure followed during satellite launches.
Lessons from NVS-02 Failure
Launched on January 29, 2025, NVS-02 successfully reached its initial transfer orbit but failed to enter its designated final orbit because its propulsion engine could not be activated.
An investigation found that the electrical signal required to open the oxidiser-line pyro valve may not have reached the mechanism. A possible disconnection in at least one of the primary or redundant electrical connector paths was identified as the likely cause.
To avoid a recurrence, ISRO has planned to keep the relevant pyro valves open before the NVS-03 launch, eliminating the need for an electrical command to open them in space.
However, some space experts have raised concerns about potential fuel leakage, pressure variations and intense vibrations during launch. The satellite’s isolation latch valves will play a crucial role in ensuring safe and reliable operations.
Key Features of NVS-03
NVS-03 is the third satellite in the second generation of India’s NavIC navigation constellation. Weighing approximately 2,250 kg, it is scheduled to be launched aboard the GSLV-F18 rocket from Sriharikota.
The satellite also incorporates indigenous atomic clock technology.
If successful, the mission will strengthen India’s independent positioning, navigation and timing capabilities, reducing reliance on foreign navigation systems and improving the reliability of NavIC services.