Improving GPS-Based Landing System Performance using an Empirical Barometric Altimeter Confidence Bound
by
Jan, S., D. Gebre-Egziabher, T. Walter, P. Enge
in
IEEE Transactions on Aerospace Electronic Systems, Vol 43, No. 3. July, 2007.
Category: Journal Article
Click here to request an electronic copy of this paper.
Abstract:
This paper develops an empirical confidence bound for barometric altimeter altitude errors and shows how this bound may improve the performance of GPS-based approach and landing systems. This empirical bound is developed using historical meteorological data collected at a set of geographically diverse locations over a thirty year period. The confidence bound developed is shown to provide a Gaussian over-bound on altimeter altitude errors in standard atmospheric conditions between a 10-5 and 10-6 confidence level. This confidence bound is integrated into the standard methodology for analyzing the performance of GPS-based landing systems and the results of a performance trade study using the confidence bound are presented. The results show that incorporating the empirical barometric altimeter confidence bound provides an increase in the CONUS service volume for Lateral Precision with Vertical Guidance (LPV) type approaches. While this increase is approximately 2% for an L1 single-frequency GPS user, it jumps to roughly 40% for an L5 single-frequency user.
This entry has been accessed 1308 times.