Ambiguity Fixing for Kinematic PPP with Integer Phase Clock

Abstract

The implementation of precise point positioning ambiguity fixing depends on the products which can be used to recover the characteristics of ambiguity by the service side. When users need to implement single difference between satellite method and the decoupled clock method they have no way to achieve the products, so they must provide the products themselves hard, but when users need to implement the integer phase clock method they can use the wide-lane FCB and integer phase clock provided by CNES. Therefore, in this paper we put forward the algorithm of sequential ambiguity fixing with direct rounding and analyze the effects of ambiguity fixing kinematic PPP based on this method. First we analyze the principle of PPP ambiguity fixing based on the models, and then we introduce the algorithm and how the users have to implement integer phase clock method. Last, based on the principle analysis we design the single-day and two-hour dynamic experiments, which are simulated by static data. Results of numerous stations show that: the algorithm of sequential ambiguity fixing with direct rounding can significantly improve the accuracy of positioning and the east shows more obvious effects, the improvement proportion of single-day and two-hour were approximately 30 and 60 %, so the result can verify the validity of the method proposed.