Improvement of GPS ambiguity resolution using prior height information.PartⅡ:The method of using quasi observation

来源期刊：中南大学学报(英文版)2002年第4期

论文作者：朱建军 Rock Santerre

文章页码：260 - 266

Key words：ambiquity resolution; algorithmwith quasi observation; robustness

Abstract: This paper deals with the method of using quasi observation. In the paper a simple algorithm is developed for the adjustment computation with quasi observation at first. And then the ability of quasi observation to improve ambiguity search technique is studied in detail. The robustness ofthe method is also discussed.A method to determine the weight of quasi observation is proposed. The results showthat a prior height can be taken as a quasi observation and used togetherwith GPS observations. It can strengthen residual tests, especially in situationwhere there are fewersatellites in the sky. It also can change structure of incorrect solutions,which will theoreticallymake less incorrect solutions left in search space. At last the field tests are carried out to show that the proposed method is effective. The success rate of ambiguity resolution in the four field tests is improved significantly.