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FAST AMBIGUITY RESOLVING METHOD AMONG MULTI-CONSTELLATION REFERENCE STATIONS BASED ON AMBIGUITY TIGHT CONSTRAINT AND APPLICATION THEREOF
FAST AMBIGUITY RESOLVING METHOD AMONG MULTI-CONSTELLATION REFERENCE STATIONS BASED ON AMBIGUITY TIGHT CONSTRAINT AND APPLICATION THEREOF
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机译：基于歧义严格约束的多星座参考站之间的快速歧义解决方法及其应用
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摘要
Disclosed are a fast ambiguity resolving method among multi-constellation reference stations based on ambiguity tight constraint and an application thereof, comprising: firstly, determining easy-to-fix satellites according to satellite cut-off elevation angle, ambiguity floating-point solution deviation, and continuous filtering frequency; then, selecting an optimal subset of ambiguity for the easy-to-fix satellites by utilizing a partial ambiguity fixing strategy, with an ambiguity variance as a screening standard and an ambiguity fixing success rate and a Ratio value as thresholds; and finally, by constructing a "pseudo" observation equation, applying tight constraint onto the ambiguity in the optimal subset to a fixed solution, updating a filtering equation, and fixing the ambiguity of all the satellites. By means of the method provided by the present invention, the prior success rate and the Ratio value of ambiguity fixing can be significantly improved, the initialization time among the reference stations is shortened, the convergence speed of newly-arisen satellites is accelerated, and more available satellites are provided for network RTK users.
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