ISRO Restores NavIC Constellation With Successful NVS-03 Satellite Launch

Atomic clock failures on older satellites and orbit errors in newer units degraded the NavIC constellation. These issues reduced the network's operational capacity.

1. The NVS-03 satellite restores the Navigation with Indian Constellation (NavIC) to a minimum operational configuration of four satellites.

2. The satellite adds the L1 signal to the L5 and S-band signals of the Navigation with Indian Constellation (NavIC) system.

3. The NVS-03 satellite carries both an indigenous atomic clock and procured atomic clocks.

4. The mission achieved a turnaround time of 56 days between successive GSLV launches.

5. The NVS-03 satellite has a planned 12-year mission life.

1. The NVS-02 mission failed. This event highlighted risks during launch and orbit-raising. The NVS-03 satellite reached its transfer orbit.

2. NavIC serves as an indigenous alternative to global navigation systems, such as the US-operated Global Positioning System (GPS), Russia's GLONASS, and China's BeiDou.

3. The NVS-02 mission failed to reach its final circular orbit. The onboard liquid-fueled engine did not ignite. An investigation by the Indian Space Research Organisation (ISRO) Apex Committee identified a disrupted electrical circuit at the pyro valve as the cause. It reached only its initial 170-kilometer by 37,785-kilometer elliptical orbit. Its liquid-fueled engine failed to ignite during the orbit-raising maneuver.