en.wikipedia.org/wiki/Indian_Regional_Navigation_Satellite_System
3 corrections found
NVS-02, launched on 29 January 2025, failed to reach orbit.
This overstates the failure. ISRO says NVS-02 was successfully injected into an elliptical transfer orbit; the failure was that it could not raise itself from that transfer orbit to its intended circular orbit.
Full reasoning
ISRO's official postmortem for NVS-02 says the spacecraft was injected successfully into orbit on January 29, 2025: specifically, an elliptical transfer orbit of 170 × 37,785 km. What failed later was the orbit-raising operation needed to move it from that transfer orbit to its intended circular operational orbit. So saying it "failed to reach orbit" is inaccurate; it reached an orbit, but not the intended final orbit.
1 source
- NVS-02 Spacecraft: On-Orbit Observations and Apex Committee Recommendations
NVS-02 ... was injected successfully into the elliptical transfer orbit of 170 x 37785 km ... However, the orbit raising operations from the elliptical to circular orbit could not be carried out.
32.5° E, 83° E, and 131.5° E
ISRO's official NavIC description gives the three GEO longitudes as 32.5°E, 83°E, and 129.5°E — not 131.5°E.
Full reasoning
The official ISRO description of the NavIC space segment states that the three geostationary satellites are placed at 32.5°E, 83°E, and 129.5°E. This article's use of 131.5°E conflicts with ISRO's published system description and with the article's own later satellite table, which lists IRNSS-1G/NVS-01 at 129.5°E.
1 source
- Satellite Navigation Services
Three satellites of the constellation are placed in geostationary orbit, at 32.5°E, 83°E and 129.5°E respectively.
The IRNSS network is, as of November 2024, confined to strategic use by the Indian Armed Forces.
ISRO says NavIC is not limited to military use: it offers an open Standard Position Service for civilian users and supports many civilian applications via free-to-air signals.
Full reasoning
This sentence contradicts ISRO's own description of NavIC. ISRO states that NavIC provides Standard Position Service (SPS) for civilian users and Restricted Service (RS) for strategic users. ISRO's NavIC FAQ also says many civilian applications are possible using the satellites' free-to-air navigation signals. So the network is not "confined to strategic use by the Indian Armed Forces."
2 sources
- Satellite Navigation Services
NavIC offers two services: Standard Position Service (SPS) for civilian users and Restricted Service (RS) for strategic users.
- Navigation
However, many civilian applications are possible using free-to-air navigation signals broadcast from the satellites.