Improving GPS-based landing system performance using an empirical barometric altimeter confidence bound

Shau Shiun Jan, Demoz Gebre-Egziabher, Todd Walter, Per Enge

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

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 overbound on altimeter altitude errors in standard atmospheric conditions between a 105 and 106 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 oterminous United States (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.

Original languageEnglish
Pages (from-to)127-146
Number of pages20
JournalIEEE Transactions on Aerospace and Electronic Systems
Volume44
Issue number1
DOIs
Publication statusPublished - 2008 Jan

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering

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