On March 13, 2026, a small atomic clock stopped working.

This moment marked the official failure of India's domestically developed navigation system NavIC, which had taken 27 years and billions of rupees to build.

A satellite navigation system requires at least four satellites in orbit to provide positioning services. When the last functioning atomic clock on the IRNSS-1F satellite failed, the number of available satellites in the NavIC constellation dropped to three, causing the entire constellation to lose its navigation capability.

The 27-Year Journey Through the Stars, How It Gradually Collapsed

The birth of NavIC came from a humiliation.

During the 1999 Kargil conflict between India and Pakistan, India requested the United States for precise GPS positioning data to support military operations, but was denied. This rejection deeply wounded New Delhi and directly spurred India's determination to develop its own navigation system.

Over the next decade, the Indian Space Research Organisation (ISRO) launched nine first-generation navigation satellites into orbit, forming the original NavIC constellation. Each of these satellites was equipped with three rubidium atomic clocks imported from Swiss company SpectraTime, providing positioning services through extremely accurate time signals.

However, trouble began to accumulate from 2016. The atomic clocks produced by SpectraTime started to fail in large numbers, affecting the Galileo navigation satellites operated by the European Space Agency as well. Five satellites in the NavIC constellation were completely报废 due to all their atomic clocks failing, nearly collapsing the entire first-generation system.

ISRO then began developing the second generation of the NavIC system, adopting a combination of self-developed and partially imported atomic clocks. In 2023, the first second-generation satellite NVS-01 was successfully launched, allowing the NavIC constellation to once again reach the minimum threshold of four operational satellites, barely maintaining normal operation.

But this number concealed a time bomb ready to explode at any moment.

IRNSS-1F, one of the remaining satellites from the first generation, has two of its three atomic clocks already failed, with only one left to keep it running. Any experienced engineer would know that this satellite's countdown has already begun.

Relief Efforts Faced Continuous Failures, Crisis Erupted at the Worst Time

In early 2025, ISRO launched the NVS-02 satellite aboard the GSLV-F15 rocket. The rocket launch was successful, and the satellite smoothly entered the geostationary transfer orbit, seemingly setting the stage for a turnaround.

But the turning point disappeared at the last moment.

A fault occurred in the ignition channel of the main propulsion valve of the satellite, preventing NVS-02 from completing the maneuver from the transfer orbit to the target geostationary orbit. ISRO subsequently established an investigation committee, and after several months of investigation, confirmed that at least one pin had fallen off each redundant connector on the valve, preventing the ignition command from being transmitted.

This failure transformed NavIC's risk from a "theoretical possibility" into a "real crisis," forcing ISRO to accelerate the preparation for the launch of NVS-03.

However, fate played another cruel joke. In January 2026, ISRO's main rocket PSLV failed during the PSLV-C62 mission, and 16 satellites did not enter their intended orbits. This marked a rare series of failures for ISRO's main rockets, prompting the Indian space agency to announce an immediate halt to all rocket launches for a comprehensive inspection, which lasted for a full three months.

During this precious window period, on March 13, 2026, the last atomic clock on IRNSS-1F stopped ticking. NavIC was declared non-operational.

Strategic Costs Go Far Beyond Navigation

The consequences of NavIC's failure go far beyond Indian users switching back to Google Maps.

From a military perspective, NavIC was originally the core strategic asset for India's armed forces to implement precision guidance and reduce reliance on the US GPS. If a conflict arises, losing autonomous navigation capabilities means what, the Kargil War of 1999 has already given an answer.

From a civilian perspective, Indian smartphones, fisheries navigation, agricultural precision positioning, and disaster warning systems all rely to some extent on NavIC signals. The system's failure will force these users to fully return to the coverage of the US GPS or Russian GLONASS.

Currently, ISRO is accelerating the preparation for the launch of NVS-03, but the launch schedule remains undecided. At the same time, there are voices calling for ISRO to explore the possibility of introducing Indian private aerospace companies to deploy small navigation satellite constellations in low Earth orbit, to rebuild navigation capabilities at a faster pace.

A single atomic clock ended a nation's 27-year dream of navigation independence. Whether India can rebuild this star network faster and with more robust engineering quality will be the most stringent test of its aerospace industry's true capabilities.

Original article: toutiao.com/article/7617764003699229230/

Statement: The views expressed in this article are those of the author.