ISRO’s NVS-02 Satellite Faces Orbit-Raising Challenge

The Indian Space Research Organisation (ISRO) is addressing a significant technical issue with its NVS-02 navigation satellite, launched on January 29, 2025, aboard the GSLV-F15 rocket. Post-launch, the satellite’s solar panels deployed successfully, and communication with ground control was established. However, a malfunctioning valve has prevented the Liquid Apogee Motor (LAM) from firing, hindering the satellite’s orbit-raising maneuvers. Consequently, NVS-02 remains in an elliptical Geosynchronous Transfer Orbit (GTO) instead of reaching its designated geostationary orbit.

What Led to the Orbit-Raising Hurdle?

The primary issue stems from valves that failed to open, preventing the oxidizer from reaching the thrusters necessary for orbit-raising operations. Despite the satellite’s systems functioning nominally and maintaining communication with ground stations, this malfunction has stalled its progression to the intended orbit.

How Is ISRO Addressing the Situation?

ISRO has convened a dedicated committee to explore potential recovery strategies. Efforts to rectify the valve malfunction have been ongoing since the issue was identified post-launch. While the satellite remains operational, the inability to perform orbit-raising maneuvers poses a significant challenge.

What Are the Implications for India’s Navigation System?

NVS-02 is part of India’s Navigation with Indian Constellation (NavIC), an independent regional navigation satellite system designed to provide accurate Position, Velocity, and Timing (PVT) services. The current setback with NVS-02 may impact the planned augmentation of the NavIC constellation, which aims to enhance navigation services across India and its surrounding regions.

Summary of the news