What is Satellite navigation?
A '''satellite navigation''' or '''satnav''' system is a way of pinpointing position very exactly. Satnav uses a system of [[satellite (artificial)|satellites]]. The system gives exact positioning. It allows small [[electronics|electronic]] receivers to find their position ([[longitude]], [[latitude]], and [[altitude]]/[[elevation]]). The position is given within a few metres using [[time signal]]s [[transmitter|transmitted]] along a straight line (line of sight) by [[radio]] from [[satellite]]s. The signals also allow the receivers to calculate the current local time to high precision. A satellite navigation system with global coverage may be called a '''global navigation satellite system''' ('''GNSS'''). [[Global Positioning System]] is the biggest and most used GNSS. [[GLONASS]], owned by Russia, is the second biggest. [[China]], India, and the [[European Union]] are working on similar systems of their own. [[Category:Satellites]] [[Category:Navigation]]