This paper describes an automated method for predicting the number of satellites visible to a GPS receiver, at any point on the Earth's surface at any time. Intervisibility analysis between a GPS receiver and each potentially visible GPS satellite is performed using a number of different surface models and satellite orbit calculations. The developed software can work with various ephemeris data, and will compute satellite visibility in real time. Real-time satellite availability prediction is very useful for mobile applications such as in-car navigation systems, personal navigations systems and LBS. The implementation of the method is described and the results are reported.
In REF , an automated method for predicting the number of satellites available to a GPS receiver, at any point on the Earth's surface at any time, is described.
Modelling and prediction of GPS availability with digital photogrammetry and LiDAR
International Journal of Geographical Information Science
Computer Science