Centimeter Navigation and Surveying with On-The-Fly Ambiguity Resolution

Alfred Leick, Ali Oufrid, Paulo Segantine and Inseong Song

Abstract:	Recent advances in dealing with Anti-Spoofing (A-S) make the dual-frequency P-code receivers much more attractive because they provide the most complete set of observables. The epoch solution for dual-frequency P-code receivers is described. The ellipse of standard deviations for the wide-lane and Ll ambiguities is very narrow and is essentially perpendicular to the wide lane ambiguity axis. Some of the epoch solutions are studied in order to develop an appreciation of the Kalman filter implementation. Controlling multipath becomes important if the wide lane ambiguity or the undifferenced ambiguities are to be computed from individual or a small number of single-epoch solutions. This is particularly true for low altitude satellites. Two experiments are discussed which were processed with Ashtech’s PNAV program. The position of the moving receiver is estimated for each epoch or for a specified time interval, thus combining kinematic GPS, static GPS, and the so-called ambiguity fixing On-The-Fly (OTF) technique in a unified approach which applies equally well to dynamic and static situations and requires no antenna swaps.
Published in:	Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993) June 21 - 23, 1993 Royal Sonesta Hotel Cambridge, MA
Pages:	495 - 504
Cite this article:	Leick, Alfred, Oufrid, Ali, Segantine, Paulo, Song, Inseong, "Centimeter Navigation and Surveying with On-The-Fly Ambiguity Resolution," Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993), Cambridge, MA, June 1993, pp. 495-504.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In