Context:
An ISRO investigation committee has concluded that a broken electrical circuit caused the NVS-02 navigation satellite mission failure in January 2025, preventing the spacecraft from reaching its intended orbit within India’s NavIC navigation constellation.
Key Highlights:
- Launch Outcome
- The GSLV-F15 launch vehicle successfully placed NVS-02 into an elliptical transfer orbit.
- However, the spacecraft failed to achieve its intended circular orbit, which is essential for navigation satellite operations.
- Cause of Failure
- The failure occurred because a signal did not reach the pyro valve controlling the oxidiser line of the engine.
- The investigation found that a broken electrical circuit, caused by disengagement of connector contacts, disrupted the signal required to activate the valve.
- Corrective Measures
- ISRO implemented improvements in pyro system redundancy and reliability based on the committee’s recommendations.
- These corrective measures were applied in the CMS-03 mission launched in November 2025, which was successfully executed.
- Parallel Investigations
- A separate committee is examining anomalies in the PSLV rocket, which experienced two consecutive launch failures in May 2025 and January 2026.
- According to the government, the PSLV failures are unrelated to the NVS-02 issue.
Relevant Prelims Points:
- NavIC (Navigation with Indian Constellation)
- India’s regional satellite navigation system developed by ISRO.
- Provides positioning services over India and surrounding regions up to about 1,500 km.
- Geosynchronous Satellite Launch Vehicle (GSLV)
- A launch vehicle used by ISRO to place satellites into geosynchronous orbits.
- Uses cryogenic upper-stage technology.
- Elliptical Transfer Orbit
- An intermediate orbit used to move satellites from launch trajectory to final circular orbit.
- Pyro Valve
- A valve triggered by a pyrotechnic device (small explosive charge) used to control the flow of fluids in critical systems like rocket engines.
- Oxidiser
- Chemical substance supplying oxygen for combustion in a rocket engine’s propellant system.
Relevant Mains Points:
- Importance of NavIC System
- NavIC provides indigenous satellite navigation capability, reducing reliance on foreign systems like GPS, GLONASS, Galileo, and BeiDou.
- It supports strategic applications such as defence navigation, maritime monitoring, disaster management, and transportation systems.
- Lessons for India’s Space Programme
- The incident highlights the importance of system reliability, redundancy, and quality assurance in complex space missions.
- Even minor hardware faults can lead to mission failure despite successful launch operations.
- Strengthening Launch Reliability
- The implementation of enhanced redundancy in pyro systems ensures backup mechanisms to prevent similar failures.
- Continuous review committees help improve engineering processes and mission assurance protocols.
- Strategic Implications
- A reliable satellite navigation constellation is essential for military precision, civilian navigation, logistics, and emerging technologies like autonomous vehicles.
- Strengthening launch reliability also reinforces India’s credibility in the global space launch market.
- Way Forward
- Enhance quality testing and electrical connector reliability during spacecraft integration.
- Strengthen redundancy systems in critical mission components.
- Improve independent review mechanisms and mission assurance protocols.
- Continue expanding the NavIC constellation for greater regional coverage and accuracy.
UPSC Relevance:
- GS Paper III: Space technology, satellite navigation systems.
- Prelims: NavIC, GSLV, pyro valve, oxidiser, satellite orbits.