Real-Time WADGPS Corrections from Undifferenced Carrier Phase

Paul Collins, Francois Lahaye, Jan Kouba and Pierre Heroux

Abstract:	The Geodetic Survey Division (GSD) of Natural Resources Canada (NRCan) is currently enhancing its real-time Wide Area Differential GPS system with carrier phase processing. This development is aimed at improving the quality of GPS satellite clock corrections to facilitate real-time carrier phase Precise Point Positioning (PPP). By-products of this development are precise estimates of station clocks and tropospheric zenith delays both at the wide-area reference stations, and potentially at any user™s site. Preliminary results indicate that tropospheric zenith delays can be recovered with an RMS accuracy of approximately one centimetre, station clock corrections can be recovered with an RMS accuracy of 0.1-0.2 nanoseconds, and satellite clock corrections can be recovered with an RMS accuracy of approximately one nanosecond. Positioning tests with dual frequency data indicate that RMS accuracies between 10 and 30cm can be achieved in latitude, longitude and height.
Published in:	Proceedings of the 2001 National Technical Meeting of The Institute of Navigation January 22 - 24, 2001 Westin Long Beach Hotel Long Beach, CA
Pages:	254 - 260
Cite this article:	Collins, Paul, Lahaye, Francois, Kouba, Jan, Heroux, Pierre, "Real-Time WADGPS Corrections from Undifferenced Carrier Phase," Proceedings of the 2001 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 2001, pp. 254-260.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In