A sat nav system (satellite navigation) is an arrangement of satellites that assists the users in determining the position of a device within a few meters to anywhere on the earth’s surface. Similar arrangement that covers the complete global are is known as Global Navigation Satellite System (GNSS). Every developed or developing nation has its own GNASS, such as NAVSTAR Global Positioning System (GPS) from United States, Union’s Galileo navigation system from Europe, Global Navigation Satellite System (GLONASS) from Russia, Indian Regional Navigation Satellite System (IRNSS) from India, and BeiDou from China. All these sat nav’s Continue reading...