The Stanford - ESA Integrity Diagram: A New Tool for The User Domain SBAS Integrity Assessment

M. Tossaint, J. Samson, F. Toran, J. Ventura-Traveset, M. Hernandez-Pajares, J.M. Juan, J. Sanz and P. Ramos-Bosch

Peer Reviewed

Abstract:	A new diagram for SBAS integrity validation is presented in this paper. The proposed concept is a modification of the well known Stanford plot, where a 2D histogram shows the relationship of position errors against protection levels for a set of measurements using an all-in-view satellite selection. The method consists of a new representation (known here as the Stanford-ESA Integrity Diagram) where, at each sample time and given location, the solutions from all possible combinations of satellites from four to all-in-view are displayed, instead of only the all-in-view one. In the case of MIs, the geometries associated to each epoch are labeled with different symbols and colors. The diagram allows for easy identification of the different clusters and assessment of the time correlation of the events. Real measurement results are presented here showing that EGNOS integrity margins remain safe under this very exigent criterion, which is certainly a very positive result.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 54, Number 2
Pages:	153 - 162
Cite this article:	Tossaint, M., Samson, J., Toran, F., Ventura-Traveset, J., Hernandez-Pajares, M., Juan, J.M., Sanz, J., Ramos-Bosch, P., "The Stanford - ESA Integrity Diagram: A New Tool for The User Domain SBAS Integrity Assessment", NAVIGATION: Journal of The Institute of Navigation, Vol. 54, No. 2, Summer 2007, pp. 153-162.
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