Title :
Single point satellite navigation accuracy-what the future may bring
Author :
Lachapelle, G. ; Klukas, R. ; Qiu, W. ; Melgard, T.E.
Author_Institution :
Dept. of Geomatics Eng., Calgary Univ., Alta., Canada
Abstract :
In order to assess the level of accuracy which may be available in the future with GPS as better broadcast or quasi real-time precise ephemerides become available, the accuracy performance and long term stability of single point GPS is analyzed using P code L1 and ionospherically corrected (L1/L2) data collected over a period of several months at selected permanent stations of the Canadian Active Control System. Precise post-mission orbits are used for the analysis. Instantaneous and time-averaged positioning is investigated to assess accuracy enhancement versus observation time. Statistics for various solutions in each of the three coordinate components are presented. A comparison of results obtained with precise and broadcast orbits is presented. A comparison of L1 versus L1/L2 results yield a quantitative estimate of the effect of the ionosphere on each of the three coordinate components
Keywords :
ionospheric electromagnetic wave propagation; radionavigation; radiowave propagation; satellite relay systems; Canadian Active Control System; GPS; L1/L2 data; P-code L1; accuracy enhancement; accuracy performance; broadcast precise ephemerides; instantaneous positioning; ionosphere; ionospherically corrected data; long term stability; observation time; post-mission orbits; real time precise ephemerides; single point satellite navigation accuracy; statistics; time-averaged positioning; Control systems; Global Positioning System; Orbits; Performance analysis; Real time systems; Satellite broadcasting; Satellite navigation systems; Stability analysis; Statistics; Yield estimation;
Conference_Titel :
Position Location and Navigation Symposium, 1994., IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
0-7803-1435-2
DOI :
10.1109/PLANS.1994.303290
