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Indian Regional Navigation Satellite System, IRNSS-1G, PSLV-C33 (Polar Satellite Launch Vehicle)

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NAVIC (Navigation with Indian Constellation)

Isro has successfully launched IRNSS-1G, the last in the series of seven navigation satellites. PSLV-C33 (Polar Satellite Launch Vehicle) placed the satellite in orbit.

The seventh and final satellite of the Indian Regional Navigation Satellite System, the IRNSS 1G, was launched into a sub geosynchronous transfer orbit with a perigree (nearest point to earth) of 284 km and an apogee (farthest point to earth) of 20,657 km. The satellite was launched on board the Polar Satellite Launch Vehicle (PSLV).

With this launch, India does not have to depend on another nation for military navigation.

The IRNSS constellation of seven satellites is now complete.

This will allow the Indian Space Research Organisation (ISRO) to focus on the process of designing front end chips which will receive the navigational signals sent out by the satellites.

The system will be similar to the Global Positioning System (GPS) operated by the United States with 24 satellites and the Glonass, Galileo and BeiDou systems of Russia, Europe and China respectively.

The Indian Regional Navigation Satellite System comprising seven satellites would be able to provide navigation system with much better accuracy and targeted position.

Total area of 1,500 km from Indian boundaries will be covered under the navigational system.

The Prime Minister invited other countries to make use of this system as well. “We have seven neighbours who rely on technology provided by other countries. They can use Indian services if they want,” he said in a video message addressed to ISRO engineers.

It is designed to provide accurate real-time positioning and timing services over India and region extending to 1,500 km around India.

The system will be very much similar to the GPS of the US which has 24 satellites, Glonass of Russia (24 satellites), Galileo of Europe (27 satellites) and China's Beidou (35 satellites).

The system will be used for terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management, integration with mobile phones, precise timing, mapping and geodetic data capture, terrestrial navigation aid for hikers and travellers, visual and voice navigation for drivers.

ISRO launched sixth navigation satellite IRNSS-1F on March 10, the other five being IRNSS-1A on July 1, 2013, IRNSS-1B (April 4, 2014), IRNSS-1C (October 16, 2014), IRNSS-1D (March 28, 2015) and IRNSS-1E (January 20, 2016).

The name NAVIC, Mr. Modi said the system was dedicated to India’s mariners and fishermen who have been navigating using the sun and stars as waypoints for hundreds of years.

“They have shown strength and determination in venturing out to sea for so many years. We have named this system for them, the ‘naviks’ (mariners),” he said.

According to Isro officials, total cost of all the seven satellites was Rs 1,420 crore and it has a 12-year mission life.

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