Atomic clock on ISRO's NavIC satellite fails, weakening India's indigenous GPS system
The last atomic clock on ISRO's IRNSS-1F satellite has failed, further weakening India's indigenous navigation system, NavIC. Atomic clocks are crucial for positional, navigational, and timing services. This failure brings the number of functional NavIC satellites down to three, from an initial eight launched between 2013 and 2018. ISRO plans to install indigenously developed rubidium clocks in the next series of satellites, with one replacement satellite (NVS-01) already featuring it. The second replacement satellite (NVS-02) launched in January 2025 failed to reach its intended orbit.
Key Points
- The atomic clock on ISRO's IRNSS-1F satellite has failed, impacting the functionality of India's NavIC system.
- Atomic clocks are essential for providing accurate positional, navigational, and timing services for satellites.
- The failure reduces the number of functional NavIC satellites to three, hindering its intended role as a fallback system for India.
- ISRO is developing and installing indigenous rubidium clocks for future NavIC satellites to enhance self-reliance.
- Challenges persist with new launches, as the NVS-02 replacement satellite failed to reach its intended orbit.
Exam Facts
- The IRNSS-1F satellite's atomic clock failed on March 13, 2026.
- IRNSS-1F completed its design mission life of 10 years on March 10, 2026.
- The atomic clocks were imported from SpectraTime, a Switzerland-based maker.
- NavIC (Navigation with Indian Constellation) is India's indigenous regional navigation satellite system.
- The NVS-01 satellite, launched in May 2023, hosts an indigenously developed rubidium clock.
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