Short Baseline Gps Solver Factors Affect The Accuracy

The main purpose of this research is on the computation task and the object is to analysis the accuracy of baseline vector from GPS observations. For the impact of initial coordinates of reference point, the author points out that the moving of the initial coordinates dose not bring on the decline of the precision of the baseline estimation. But for the mid-long baselines, the accuracy of the estimation has a distinct decline with moving of the coordinates. As for the ionosphere effect, the author takes for that there are some indeterminacy affect on the mid-long baseline. And that for the short baseline there will not be a improvement but a decline on the ionosphere-free process mode. Concerning the impact of cut-off angle of satellites and the sampling rate of recording, the writer gives some suggestions in GPS survey practice. Finally, the relationship of positioning accuracy versus session length and positioning accuracy versus baseline length in both case of short and mid-long baseline are generated for use.