Which one the following countries has its own Satellite Navigation System?

Question

Accepted Answer

Satellite navigation is based on the use of range measurements between navigational satellite and the user. Information about the satellite’s coordinates is given to the user through navigation signal. Range measurements are based on the calculation of the receiving signal time delay compared with the signals generated by the user equipment.Currently, there are four global systems viz.,GPS from USAGLONASS from RussiaGalileo from European UnionBeiDou from ChinaIn addition, there are two regional systems viz.,NavIC from IndiaQZSS from JapanGlobal navigation system caters to the users in the entire world, whereas regional navigation system caters to the users in the limited service area. Hence option (d) is the correct answer.