用于PPP模糊度固定的FCBs产品选站策略研究

Research on Station Selection Strategy of FCBs Products Used in PPP Ambiguitu Resolution

随着精密单点定位研究的不断深入和发展,精密单点定位已经由浮点解阶段逐渐发展到整数解阶段,使精密单点定位模糊度固定及相关研究方向成为了当前的研究热点。而FCBs产品又是PPP模糊度固定实现的关键和前提。鉴于当前对FCBs产品生成选站策略研究不充分的情况,本文基于数据完好率、宽巷模糊度残差值和单颗卫星综合数据质量等数据质量评定指标,运用全球格网均匀分布选站方法对计算FCBs产品的跟踪站进行选站。结果表明,运用本文的选站策略进行选站,选取40个站所计算的FCBs产品与选取230个站所计算的FCBs产品精度相当,从而大大缩短了FCBs产品的计算时间。

With the development of Precise Point Positioning（PPP）,PPP has been gradually developed by the float resolution stage to ambiguity resolution stage.PPP Ambiguity Resolution（PPP-AR）has become the research focus.Moreover,FCBs product is the precondition of the PPP-AR.However,research on station selection strategy of FCBs products is not sufficient,based on the data quality assessment parameter of data integrity rate,widelane ambiguity residuals and integrated data quality of single satellite,this paper put forward a method,which used global grid method to select the tracking station.The results show that the accuracy of FCB product which used 40 station is equal to the accuracy of FCBs product which used 230 station and greatly reduce the time which are used in calculating the FCBs products.