PRECISION OF MSAS SINGLE-POINT POSITIONING IN NORTHERN CHINA SEAS

Upon the comparison to the Qingdao GPS calibration station,the precision and accuracy of single point positioning by Getac Z710 (with GPS and MSAS receiver) are evaluated and analyzed. The dynamic solution is calculated based on two kinds of sample data, the GPS signals only, or both the GPS and MSAS signals. And the static solution of multi-epoch is calculated by two solution methods:the mean-value method, or the density-median method. Result shows that MSAS is appropriate for enhancing position accuracy in the Bohai, North Yellow Seas and their coastal zones, and there is a positive correlation between sample size and advantage of density-median and it is better than density-median method.