NVS series spacecraft
Mission typeNavigation
COSPAR ID2023-076A [1]
SATCAT no.56759[1]
Mission durationPlanned: 12 years
Elapsed: 11 months, 11 days
Spacecraft properties
ManufacturerISRO Satellite Centre
Space Applications Centre
Launch mass2,232 kilograms (4,921 lb)
Start of mission
Launch date29 May 2023, 16:10 UTC[2]
RocketGSLV-Mk2 F12
Launch siteSatish Dhawan SLP
Orbital parameters
Reference systemGeocentric
Longitude129.55° E
NVS-02 →

NVS-01 is the first in the series of second generation navigation satellite and the ninth satellite in the Navigation with Indian Constellation (NavIC), with an alternate name of, IRNSS-1J. It will augment the existing satellite and bolster the capability of the NavIC constellation by adding more robustness and new features.[3] ISRO already launched IRNSS 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H and 1I. The satellite is intended to replace IRNSS-1G and augment the constellation of geosynchronous navigation satellites after IRNSS-1I.[4]


NVS-01 has two types of payloads, navigation payload and the ranging payload. The navigation payload transmits navigation service signals to the users. This payload is operating in L1 band, L5 band and S band. A highly stable Rubidium atomic clock is part of the navigation payload of the satellite. Failure of the imported Rubidium atomic clocks across the fleet of previous generation of satellite led to the creation of an indigenous option. NVS-01 is the first navigation satellite to host the indigenous clock.[5]

The ranging payload consists of transponder which is operated in CDMA mode for two-way range measurements. The IRNSS satellites continuously emits time stamped navigation signals, which are received by the ground-based user receivers. The information is then processed by the receivers to derive their own position, velocity and time. The system provides seamless, uninterrupted services under all weather conditions.[6]

The new generation of navigation satellite features a new and improved encryption system for bolstering the communication of the satellite specially for the restricted users.[7]


The satellite will help in maintaining the continuity that was lagging due to the failure of Rubidium Atomic clocks in previous satellites whilst bolstering the feature set with new bands and longer life. The NavIC space segment consists of seven satellites. With the new series of satellites, ISRO aims to tap into the low power satellite navigation segment like Smart Watches and fitness trackers whilst cementing its Navigation system by allowing it to seamlessly integrate and interoperate with the existing Navigation system. The inclusion of the civilian L1 band will further bolsters NavIC position in the mass market.[8]


NVS-01 was successfully launched by 15th flight of GSLV (GSLV-F12) in Mk2 configuration on 29 May 2023.[9][10]

Animation of IRNSS
Around the Earth
Around the Earth - Polar view
Earth fixed frame - Equatorial view, front
Earth fixed frame - Equatorial view, side
Earth fixed frame - Polar view
   Earth ·   IRNSS-1B  ·   IRNSS-1C  ·   IRNSS-1E  ·   IRNSS-1F  ·   IRNSS-1G  ·   IRNSS-1I

See also


  1. ^ a b "IRNSS 1J Satellite details". n2yo. Retrieved 2023-05-29.
  2. ^ "Isro to launch navigation satellite NVS-01 on May 29". Hindustan Times. 2023-05-14. Retrieved 2023-05-16.
  3. ^ "ISRO's new NavIC satellite launches successfully: Why a regional navigation system matters to India". Indian Express. 2023-05-30.
  4. ^ "Isro aims for 7 more launches from India in 2021". Times of India. 12 March 2021.
  5. ^ Das, Mehul Reuben (2023-05-23). "India joins an elite club, one of 5 countries to use Rubidium Atomic Clock in their GPS satellite". Firstpost.
  6. ^ "India's navigation system gets a boost after ISRO successfully launches NVS-01 satellite". Hindustan Times. 2023-05-29.
  7. ^ "From NavIC 1.0 to 2.0, ISRO needs to learn from mistakes". Financial Express. 2023-05-23.
  8. ^ Chaitanya, SV Krishna (2023-05-30). "India's NavIC may replace GPS". The New Indian Express. Archived from the original on May 30, 2023.
  9. ^ "Isro to launch new navigation satellite on May 29". The Times of India. 2023-05-16. ISSN 0971-8257. Retrieved 2023-05-16.
  10. ^ "NVS-01 placed into orbit". The Tribune. 2023-05-29.