IRNSS in India by ISRO


The IRNSS is an autonomous regional satellite navigational system that is developed by the ISRO, which would be controlled directly by the Indian government.

The Indian regional Navigational Satellite System (IRNSS) is a constellation comprising of seven other satellites with an objective of providing access to the Global Navigation Satellite System at the most hostile situations too. The project had been developed with an intention to enhance the quality of Indian security system, as it can track the accuracy of the position within a region of 2000 km. The ISRO had decided to launch in all the seven satellites by the year 2014 with a gap of 6 months between each launching activities, the first one of the satellites has yet to be launched in the year 2011 and it is being developed with a cost estimation of around $342 million. The significant features of the IRNSS have been portrayed as follows:

  • On the completion status, the IRNSS would be covering all weather conditions over the Indian landmass, round the clock and further up to extended distance coverage of about 1500 km.
  • If compared with the existing constellations, the IRNSS would be superior in the sense of its independent functioning features and thus it would be under the direct control of Indian central government.
  • The IRNSS on its accomplishment would enter into the competitive ground with the two space navigation system in the world, i.e. the U.S. Global Positioning System and the Russian Global Navigation Satellite System, which would be another successful milestone in the Indian space history.
  • The system can operate independently without any necessary influences from other satellite systems, besides transmitting continuous navigation signals, which are powered with powerful electronic equipment and atomic clocks.
  • It could be of much help in acting as the best surveillance system, tracking in the border activities that are happening through the mountains, terrains, and deep under the sea… Thus, it can be equivalent in its functions to the security personnel, especially in tracing down the infiltration activities across the boundaries.
  • Further, the ground center of the IRNSS consists of Master Control Center to estimate the satellites’ orbits, their quality, in addition to following up the health of the satellites.

The IRNSS signals are said to consists of precision strength and special positioning service attributes and both the signals are said to be on the ‘L’ and ‘S’ bands. Further the navigational signals are said to be transmitted in the ‘S’ band frequency, which are then broadcasted through the array type antenna to achieve the maximum strength and signal coverage. The ground functionality of the IRNSS comprises of the user segments with dual frequency receiver, which helps in receiving the signals from the other constellations of the system and will be having a minimum of G/T of -25 dB/k which would be similar to that of the GPS.

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