基于部分固定策略的多系统长距离基准站间模糊度快速解算

发布时间：2019-06-14 10:19

【摘要】：基准站间整周模糊度的快速准确固定是实现网络RTK高精度快速定位的前提。对于GPS/GLONASS/BDS组合系统长基线,模糊度维数大幅度增加,加之观测噪声、大气残余误差等因素的影响,很难快速准确地固定所有模糊度,尤其是低高度角卫星模糊度。提出了一种基于部分固定策略的GPS/GLONASS/BDS组合网络长基线部分模糊度快速解算方法,以截止高度角、模糊度固定成功率以及Ratio值为主要参数,优选模糊度固定子集,以实现长距离基准站间模糊度快速固定。通过实测GPS/GLONASS/BDS三系统长基线数据的实验验证,部分模糊度固定方法可有效避免低高度角卫星对模糊度固定的影响,从而显著提高模糊度固定时的成功率及Ratio值,缩短长距离基准站间模糊度准确固定所需的时间。
[Abstract]:The fast and accurate fixing of integer ambiguity between reference stations is the premise of realizing high precision and fast positioning of network RTK. For the long base line of GPS/GLONASS/BDS combined system, the ambiguity dimension is greatly increased, coupled with the influence of observation noise, atmospheric residual error and other factors, it is difficult to fix all the ambiguity quickly and accurately, especially the low altitude angle satellite ambiguity. In this paper, a fast method for solving the long base line partial ambiguity of GPS/GLONASS/BDS combined networks based on partial fixed strategy is proposed. Taking cutoff height angle, fixed success rate of ambiguity and Ratio value as the main parameters, the fixed subset of ambiguity is selected to realize the fast fixation of ambiguity between long distance reference stations. The experimental results show that the partial ambiguity fixing method can effectively avoid the influence of low altitude angle satellite on the ambiguity fixation, thus significantly improve the success rate and Ratio value when the ambiguity is fixed, and shorten the time needed for the accurate fixation of ambiguity between long distance reference stations.
【作者单位】：东南大学交通学院;东南大学仪器科学与工程学院;
【基金】：国家自然科学基金(41574026) 江苏省"六大人才高峰"(2015-WLW-002) 中央高校基本科研业务专项(KYLX15_0159) 东南大学优秀博士学位论文培育基金(YBJJ1635)~~
【分类号】：P228

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