NavIC in Crisis: Atomic Clock Failure on IRNSS-1F and the Challenge of Building India’s Indigenous GPS System
On March 13, 2026, the last functioning atomic clock aboard the IRNSS-1F satellite — a component of India’s Indigenous Regional Navigation Satellite System (IRNSS), commercially known as NavIC (Navigation with Indian Constellation) — stopped functioning. The Indian Space Research Organisation (ISRO) confirmed the failure in a statement on March 14, noting that the satellite had…