comscore IRNSS-1G: Here are 7 important facts you should know about India’s own GPS system
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IRNSS-1G: Here are 7 important facts you should know about India’s own GPS system

IRNSS

The Indian Space Research Organisation (ISRO) has launched PSLVC33, which carries the seventh navigational satellite called IRNSS-1G (Indian Regional Navigation Satellite System). The launch took place at 12.50PM today from Sriharikota. The seventh satellite is the final part of the constellation of seven satellites in IRNSS. The IRNSS will help India become one of the few nations to have its own indigenously developed global positioning system. Here are the seven key things you should know about the ISRO s IRNSS. Also Read - Starlink satellite broadband service faces challenge in India, Elon Musk led company questioned

Also Read - Today's Google doodle is all about India's 'satellite man': Here's all you need to know

The Indian space agency had finalized the IRNSS program almost 17 years ago in 1999. The decision was taken after the US government had declined to share GPS information that could have helped the Indian Army precisely locate Pakistani troop positions during the Kargil war. Also Read - ISRO joins hands with MapmyIndia to develop a Google Maps rival

India s IRNSS system is very similar to the positioning system of the US’ that is comprised of 24 satellites. Russia has its own Glonass, which has 24 satellites. Europe and China have Galileo with 24 satellites and Beidou with 35 satellites respectively.

The main purpose of the IRNSS is to deliver indigenously developed accurate GPS service to Indian users as well as for the defense purposes. According to ISRO, the IRNSS will serve two types of services – SPS (Standard Positioning Service) and a RS (Restricted Service). The SPS will be available for all users in the country whereas the RS will be an encrypted services for authorized users, which most probably will be used for defence purposes.

ALSO READ: ISRO s Mangalyaan creates history: India becomes first country to enter Mars orbit in maiden attempt

Key application of the IRNSS include: terrestrial, aerial and marine navigation, vehicle tracking and fleet management, precise time determination, mapping and geodetic data capture and disaster management. The system will also serve hikers and travelers through terrestrial navigation. Also it would be integrated in mobile phones as well as deliver visual and voice navigation for drivers.

The IRNSS system coverage region extends up to 1,500 km from its boundary, which is said to be its primary service area. The extended service area is located between primary service, and area is surrounded by a rectangle from Latitude 30 degree South to 50 degree North, Longitude 30 degree East to 130 degree East. The IRNSS claims to deliver position accuracy of better than 20 meters in the primary service area.

Three satellites of IRNSS are placed at 5 degrees inclination called GEO satellites. Three of these satellites are installed at 32 degrees E, 83 degrees E and 131.5 degrees E. The four GSO satellites are installed in inclined orbit with longitude crossover of equatorial plane at 55 degrees E and 111.75 degrees E. GSO satellites are placed in two planes with the planes being 180 degrees apart.

 

Out of the seven, six navigational satellites (IRNSS-1A, 1B, 1C, ID,1E and 1F) have already been installed in the orbit. The final IRNSS-1G will be in orbit via an about 20 minutes of flight in space at an altitude of 500 kilometers approximately. The navigational satellite system will become fully operational by mid-2016.

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  • Published Date: April 28, 2016 1:05 PM IST



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