Practical GPS Multipath Measurement Techniques in the Presence of SA

Rgmond Barber

Abstract:	This paper presents a subset of the results of a trial conducted by All Weather Operations, Maritime Systems Dept, Defence Research Agency, Bedford, (DRA(B)), to identify an economic and effective means by which multipath effects on the Global Positioning System (GPS) receivers could be assessed. The paper details the results, and analysis of data collected from the GPS equipment. The GPS position, pseudo range and carrier data obtained from two Navstar XRSM GPS receivers is analysed for 2 points within the confines of Bedford Airfield. The data is then converted to Comma Separated Variable (CSV) format and used to analyse the performance of the receiver. This analysis provides data to validate 2 methods of identifying multipath and masking effects. The analysed data supports the mathematics of single and double Differencing techniques and indicates that data from a single receiver, processed using the Single Differencing Pseudo Range Carrier (SDPRC) technique, can be used effectively to assess the multipath and masking environment in which a GPS antenna is placed. The data further indicates that the siting and installation of a GPS reference station requires careful analysis if multipath and masking problems are to be avoided.
Published in:	Proceedings of the 1996 National Technical Meeting of The Institute of Navigation January 22 - 24, 1996 Loews Santa Monica Hotel Santa Monica, CA
Pages:	905 - 915
Cite this article:	Barber, Rgmond, "Practical GPS Multipath Measurement Techniques in the Presence of SA," Proceedings of the 1996 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1996, pp. 905-915.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In