Definition and Analysis of WAAS Receiver Multipath Error Envelopes

摘要

Multipath is the primary range error constraining the accuracy of differential GPS systems. This has been an important motivating factor in the development of receiver and antenna technologies to mitigate multipath errors. This paper describes the results of a study of GPS receiver multipath error envelopes, measured employing a high-resolution technique for use with laboratory-environment GPS signal simulators, and their consistency with multipath errors observed at the Federal Aviation Administration's (FAA) Wide Area Augmenta- tion System (WAAS) reference sites.