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Modelling and prediction of GPS availability with digital photogrammetry and LiDAR

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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.

Keywords: DSMs; GPS; LiDAR; Line Of Sight (LOS); Photogrammetry

Document Type: Research Article


Affiliations: 1: GIS Research Centre, School of Computing, University of Glamorgan, CF37 1DL, Wales 2: Department of Geography, University of Leicester, Leicester LE1 7RU, England

Publication date: January 1, 2007

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