High Accuracy GPS Orbit Determination and Positioning

V. Ashkenazi and G. H. Ffoulkes-Jones

Abstract:	Conventional GPS surveying techniques now routinely achieve accuracies of the order of 1 ppm. This paper will give details of a GPS data processing software package developed at the University of Nottingham for high precision ‘fiducial’ GPS positioning. The package, which includes options for either satellite orbit integration or orbit relaxation, and a number of integer fixing facilities, has been tested using the IAG ‘Standard Data Set’. The results from each day are compared and estimates of repeatability are presented, together with comparisons for corresponding results obtained at other establishments. Although the Nottingham results achieve precisions of approximately 2 parts in 10s or better, it will be demonstrated that, for large fiducial networks, it is more appropriate to quote absolute baseline accuracies in terms of centimetres, rather than fractions of the baseline length.
Published in:	Proceedings of the 3rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1990) September 19 - 21, 1990 The Broadmoor Hotel Colorado Spring, CO
Pages:	73 - 79
Cite this article:	Ashkenazi, V., Ffoulkes-Jones, G. H., "High Accuracy GPS Orbit Determination and Positioning," Proceedings of the 3rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1990), Colorado Spring, CO, September 1990, pp. 73-79.
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