大范围网络RTK基准站间整周模糊度实时快速解算

发布时间：2018-07-01 17:19

本文选题：大范围 + 网络RTK　；参考：《测绘通报》2017年10期

【摘要】：网络RTK是目前实现高精度实时动态定位的重要手段之一,而网络RTK高精度定位的关键问题是基准站间整周模糊度的实时快速准确固定。对于大范围网络RTK,由于基准站间距离的增加,电离层延迟误差、对流层延迟误差和卫星轨道误差相关性降低,导致基准站间整周模糊度不能快速准确地固定,因此本文提出了一种大范围网络RTK基准站间整周模糊度固定算法。该算法首先利用L1、L2载波相位观测值和P1、P2伪距观测值解算基准站间的双差宽巷模糊度;然后采用Saastamoinen模型和Chao映射函数模型相结合解算双差对流层延迟误差,并将双差宽巷模糊度作为L1、L2双差载波相位整周模糊度的约束关系来确定L1、L2双差载波相位整周模糊度;最后采用CORS站的实测数据进行试验,并将本文的试验结果同GAMIT软件的解算结果进行比对,结果表明该算法可以快速准确地实现单历元双差载波相位整周模糊度的固定。
[Abstract]:Network RTK is one of the most important methods to realize high-precision real-time dynamic location, and the key problem of network RTK high-precision positioning is the real-time, fast and accurate fixing of integer ambiguity between reference stations. For large-scale network RTK, due to the increase of distance between reference stations, the correlation between ionospheric delay error, tropospheric delay error and satellite orbit error is reduced, resulting in the integer ambiguity between reference stations can not be fixed quickly and accurately. In this paper, a fixed integer ambiguity algorithm for RTK reference stations is proposed. In this algorithm, firstly, the double difference wide lane ambiguity between reference stations is solved by using the L1 / L2 carrier phase observations and the P1P\ -2 pseudo-range observations, and then the double differential tropospheric delay error is solved by using Saastamoinen model and Chao mapping function model together, and then the double differential tropospheric delay error is solved by using the Saastamoinen model and the Chao mapping function model. The ambiguity of double differential wide lane is taken as the constraint relation of the integer ambiguity of L1 / L2 double difference carrier phase to determine the integer ambiguity of L1 / L2 double differential carrier phase. Finally, the measured data of the cors station are used to test the ambiguity. The experimental results of this paper are compared with those of Gamit software. The results show that the algorithm can quickly and accurately fix the integer ambiguity of single epoch and double difference carrier phase.
【作者单位】：辽宁工程技术大学测绘与地理科学学院;
【基金】：国家自然科学基金(41474020;41504010)
【分类号】：P228.4

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