India’s own “Indian GPS” has just added a critical satellite to its constellation.
On the night of October 30, India’s ISRO successfully launched the GSLV rocket, delivering the NVS-03 navigation satellite into space. This marks the second batch of the third-generation replacement satellites for India’s NavIC navigation system, and is one of the country’s key space missions this year.
NavIC remains relatively unfamiliar to many: it is not a global navigation system, but a regional one, covering India and a 1,500-kilometer radius beyond its borders in the Indian Ocean region, primarily serving civil aviation, fisheries, surveying, and military applications.
The initial constellation consisted of seven IRNSS satellites. Over time, their operational lifespans have expired, and issues with atomic clocks have occurred frequently.
In July this year, India’s parliament acknowledged publicly that only three satellites remained functional—insufficient to meet the minimum requirement of four for independent positioning. NavIC was thus unable to provide standalone positioning services and could only maintain basic timing functions.
The NVS series was developed precisely as a replacement fleet to sustain the system’s viability.
Its most significant upgrade: the addition of an L1 frequency signal, aligning with the standard bands used by GPS and BeiDou. This eliminates the previous exclusive frequency band, making it easier for smartphone chip manufacturers to integrate NavIC support. Additionally, the satellite features an indigenous atomic clock, reducing reliance on imported timing devices and enhancing self-reliance.
The satellite is currently in a transfer orbit and will undergo multiple orbital adjustments before reaching its designated geostationary orbit. After successful in-orbit testing, it will be formally commissioned for service.
According to plan, India intends to launch a total of five NVS-series second-generation satellites to gradually complete the full constellation renewal.
Compared to global systems such as BeiDou, GPS, and Galileo, NavIC operates on a smaller scale with a more limited coverage area. However, for India, its strategic importance is substantial: ensuring navigational autonomy during wartime or disaster scenarios, without dependence on foreign signals.
Original article: toutiao.com/article/1880514955859977/
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