India’s own global positioning system NavIC to be operational from 2018

India’s homegrown Global Positioning System (GPS), the Indian Regional Navigation Satellite System (IRNSS), alternatively named NavIC, is slated to be operational early in 2018.At present, NavIC is being tested for its accuracy and is most likely to be available in the market for public use early next year.India is now proudly among five nations in the world which have established their own satellite navigation system.we were reliant on GPS and systems from other nations The four other countries/blocs that have their own navigation satellite systems are the US, Russia, China and the European Union.The Indian Space Research Organisation (Isro) launched the satellite on board the Polar Satellite Launch Vehicle (PSLV-C33), the workhorse rocket of the space agency, at 29 May.It was developed because access to foreign government-controlled global navigation satellite systems is not guaranteed in hostile situations, as happened to the Indian military in 1999 when it was dependent on the American Global Positioning System (GPS) during the Kargil War.The project to develop the system was approved by the Indian government in May 2006.The system will cover the entire country, Indian Ocean and its surroundings, with a reach till eastern parts of Arabian Peninsula in the west and up to some parts of China in the east. In the south, the system’s signals will work till Malaysia.It will provide standard positioning service to all users with a position accuracy of 5 metre.Unlike the GPS, NavIC system has dual frequency (S and L bands) allowing use of high and low frequency signals.The system will provide two levels of service, the standard positioning service will be open for civilian use, and a restricted service (an encrypted one) for authorized users (including the military).The system consists of a constellation of 3 satellites in Geostationary orbit (GEO), 4 satellites in Geosynchronous orbit (GSO), approximately 36000 kilometres altitude above earth surface, and two satellites on the ground as stand-by, in addition to ground stations.

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