Abstract
: For aircraft precision approach operations, Earth-surface multipath observed by an aircraft GPS antenna aegraaes tne accuracy of pseudorange measurement. Uf particular concern are stabuized approaches over water where the water reflection of the GPS signal could generate sustained multipath error. A novel multi-path detection method is introduced in this work. It provides accurate estimates of multipath strength and fading frequency using a software-defined radio GPS receiver and radio frequency data collected from a top-mounted antenna. Combined with analysis of flight-test data collected from both the top-mounted antenna and a bottom-mounted antenna, the new method allows for a realistic model of the Earth-surface multipath environment. Narrow-band and wide-band airborne receivers are simulated, and their responses to Earth-surface multipath are evaluated. The two receivers are found to have different code phase error signatures in the same multipath environment. Under different conditions, both receivers can experience smoothed pseudorange bias of up to 0.3 m.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call