Abstract: | This paper investigates the problem of variance-covariance modeling of atmospheric errors for the purposes of improving the accuracy of positioning using global navigation satellite systems, as well as improving estimates of the accuracy of such positioning. A method of modeling all variances and cross-correlations among observations made in a network of positioning receivers is presented. This is done by generating a theoretical model of covariance behavior based on the physical nature of tropospheric and ionospheric errors, respectively, and then using data observed at a network of reference receivers to derive key parameters of the theoretical model. The applicability of this method is demonstrated for a network of 10 receivers with a total extent of 250 km. It is shown that proper modeling of covariances improves positioning accuracy an average of 22 percent. |
Published in: | NAVIGATION: Journal of the Institute of Navigation, Volume 51, Number 2 |
Pages: | 161 - 170 |
Cite this article: | Radovanovic, R. S., El-Sheimy, N., Teskey, W. F., "Variance-Covariance Modeling of Atmospheric Errors for Satellite-Based Network Positioning", NAVIGATION: Journal of The Institute of Navigation, Vol. 51, No. 2, Summer 2004, pp. 161-170. |
Full Paper: |
ION Members/Non-Members: 1 Download Credit
Sign In |