Abstract:

The GEOSTAR system uses only two geostationary satellites to provide positioning service for a certain user, while there are two great drawbacks in it, i.e , the position of the user is liable to be detected by enemy and the number of users is liable to be saturated. This paper suggests a brand new positioning system which employs three geostationary satellites emitting radio signals to users just like the GPS satellites do, and allows the user’s receiver to solve position based on the received radio signal as well as the reading of barometer; hence, the drawbacks of GEOSTAR are overcome. Simulation results show that the principle of this new positioning system is correct and effective.

Key words: GEOSTAR, GPS, navigation