Single Epoch Ambiguity Resolution Algorithms for Single Frequency Gps with Baseline Length and Pitch Constraints

Abstract

In some applications of GPS kinematic orientation and attitude determination, the length and pitch of the baseline can be measured by other means. Methods of single epoch single frequency ambiguity resolution with these constraints have been proposed. This paper analyzes the influence of the accuracy of the length and pitch to ambiguity resolution, and several examples are given to test Ambiguity Resolution (AR) performance of different length and pitch weight strategies. The analysis and the test results show that only proper weight of the baseline length and pitch can improve the performance of ambiguity resolution. Finally, a best weight strategy is given and a two-day long data set is used to test the method. The results show that the AR success rate is correlated to the number of satellites and the accuracy of the given pitch. The AR success rate is more than 95% and AR wrong rate is less than 0.005% if the error of pitch is less than 1.0 degree.