The Indian Space Research Organisation (ISRO) has announced plans to launch NVS-01, a navigation satellite on-board the Geosynchronous Launch Vehicle (GSLV Mk-II) on May 29th, according to a senior official.

The NVS-01 satellite will replace the IRNSS-1G satellite, which was launched in 2016 and has a 12-year mission life. The other satellites in the Navigation with Indian Constellation (NavIC) system constellation include IRNSS-1A, 1B, 1C, 1D, 1E, and 1F, which were launched between July 2013 and March 2016.

To meet the nation’s positioning, navigation, and timing requirements, ISRO established NavIC, a regional navigation satellite system consisting of seven satellites and a network of ground stations. Three of the satellites are in geostationary orbit, and four are in the inclined geosynchronous orbit, while the ground network includes a control centre, precise timing facility, range and integrity monitoring stations, and two-way ranging stations.

NavIC offers two services: the standard position service (SPS) for civilian users and the restricted service (RS) for strategic users, both of which operate in L5 (1,176.45 MHz) and S band (2,498.028 MHz). NavIC signals can provide a position accuracy of better than 20m and timing accuracy of better than 50ns, covering India and a region up to 1,500km beyond its borders. The mission life of the functioning NavIC satellites ranges from 10 to 12 years.