宽巷组合及轨迹约束下的列车在轨动态单历元定位算法  

Train on Track Kinematic Single Epoch Positioning Algorithm Based on Wide-lane Combination and Track Constraints

作　　者：王德军[1,2,3] 熊永良[1] 刘宁[1] 徐韶光[1] 

机构地区：[1]西南交通大学测量工程系,四川成都610031 [2]河北工业大学土木学院测绘工程系,天津300401 [3]河北省土木工程技术研究中心,天津300401

出　　处：《测绘学报》2014年第2期131-136,150,共7页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(40874015;41274044)

摘　　要：动态单历元定位的一个关键问题是模糊度的正确解算。通过增加约束条件,可提高单历元解算模糊度的可靠性。当接收机沿线路中线运动时,首先根据接收机的伪距差分位置,计算出其大致里程,进而根据该里程处的线路设计数据构造轨迹约束条件。由于宽巷组合波长较长,其模糊度比较容易确定。通过附加轨迹约束条件,首先固定宽巷模糊度。在宽巷模糊度固定后,再次附加轨迹约束来确定L1、L2模糊度。试验结果表明该算法可获得很高的解算成功率。A key issue of kinematic single epoch positioning is the correct resolution of ambiguity. It can be improved that the reliability of the single epoch ambiguity resolution by adding constraints. When the receiver moves along a road center line, the approximate mileage can be calculated by pseudorange differential positioning, then construct track constraints according to line design data of the mileage. Wide lane ambiguity can be determined more easily because its wavelength is longer. Firstly, wide lane ambiguity is fixed by additional track constraints, then ambiguities of L1 and L2 are determined through additional track constraints again. Experimental results show that the proposed algorithm has a high resolution success rate.

关 键 词：轨迹约束 单历元 动态定位 宽巷组合 模糊度 

分 类 号：P228[天文地球—大地测量学与测量工程]