Dictionary:Satellite navigation (satnav)
1. Location determination by the Global Positioning System (q.v.). Permits continuous determination of location based on observations of a navigation satellite. 2. The Transit system (which has been phased out by the Global Positioning System) consisted of satellites in polar orbits that transmitted ultra-stable carrier frequencies of 150 and 400 MHz. It provided timing and range information that gave a fix once for each satellite transit. See Figure K-1.