The IRNSS or Indian Regional Navigation Satellite System, is a satellite navigation system, developed by Indian Space Research Organisation (ISRO). It is also known as NavIC, an operational name, acronym for NAVigation with Indian Constellation. To date, it is a constellation of total eight operational satellites, which are currently active in their orbit. Three of these satellites are placed in the geostationary orbit (GEO), and the remaining five are in the geosynchronous orbit (GSO) that have an inclination of 29° to the equatorial plane. This system gives a coverage to whole India, and the surrounding areas.

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Indian Regional Navigation Satellite System
Indian Regional Navigation Satellite System

The NavIC Constellation

IRNSS-1A (Launch date : Jul 01, 2013 ‖ Launch vehicle : PSLV-C22)
IRNSS-1B (Launch date : Apr 04, 2014 ‖ Launch vehicle : PSLV-C24)
IRNSS-1C (Launch date : Oct 16, 2014 ‖ Launch vehicle : PSLV-C26)
IRNSS-1D (Launch date : Mar 28, 2015 ‖ Launch vehicle : PSLV-C27)
IRNSS-1E (Launch date : Jan 20, 2016 ‖ Launch vehicle : PSLV-C31)
IRNSS-1F (Launch date : Mar 10, 2016 ‖ Launch vehicle : PSLV-C32)
IRNSS-1G (Launch date : Apr 28, 2016 ‖ Launch vehicle : PSLV-C33)
IRNSS-1I (Launch date : Apr 12, 2018 ‖ Launch vehicle : PSLV-C41)

It is important to note that, the IRNSS-1H satellite was planned to be launched on Aug 31, 2017, by PSLV-C39. But, it could not be placed into expected sub geosynchronous transfer orbit (Sub-GTO) as the mission was unsuccessful.

Services Provided by IRNSS

The Indian Regional Navigation Satellite System provides two types of services, viz. Standard Positioning Service (SPS) for all users, and Restricted Service (RS) for only authorised users.

Applications of IRNSS

The IRNSS satellites provides signal from the space that transmit positioning and timing data to the ground station. Then the data is used to apply in various fields of analysis. The major applications are:

  1. Determining time and location.
  2. Navigation of marine, aerial, and terrestrial features.
  3. Various fields of disaster management.
  4. Acquisition of mapping and geodetic data.
  5. Integration with mobile phones.

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