USE OF A COVARIANCE ANALYSIS TECHNIQUE FOR PREDICTING PERFORMANCE OF REGIONAL-AREA DIFFERENTIAL CODE AND CARRIER-PHASE NETWORKS

J. Raquet, G. LaChapelle, and L. P. S. Fortes

Peer Reviewed

Abstract:	There is currently great interest in using regional-area reference receiver networks on the order of hundreds of kilometers to perform precise 10 cm or better kinematic positioning using GPS carrier-phase measurements. When designing or using such a network, it is important to be able to determine design trade-offs by predicting what the errors will be under various network configurations e.g., number geometry of receivers, ionospheric levels . This paper presents a method for predicting the level of differential double-difference code and carrier-phase errors that is capable of taking all these considerations into account. This method uses a covariance analysis technique, which is based on a network differential algorithm that minimizes the differential error variances the NetAdjust method . After validation, this method is applied to a number of what-if scenarios, demonstrating the usefulness of the approach when designing or using a regional-area differential GPS network for precise positioning.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 48, Number 1
Pages:	25 - 34
Cite this article:	Raquet, J., LaChapelle, G., Fortes, L. P. S., "USE OF A COVARIANCE ANALYSIS TECHNIQUE FOR PREDICTING PERFORMANCE OF REGIONAL-AREA DIFFERENTIAL CODE AND CARRIER-PHASE NETWORKS", NAVIGATION: Journal of The Institute of Navigation, Vol. 48, No. 1, Spring 2001, pp. 25-34.
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