Single point satellite navigation accuracy-what the future may bring

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.<
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