长距离网络RTK实时厘米级定位算法

发布时间：2018-05-16 18:00

本文选题：GPS定位 + 网络RTK　；参考：《测绘科学》2017年12期

【摘要】：针对CORS系统建设成本高和选址困难的问题,该文提出GPS长距离网络RTK定位算法。该算法首先利用MW组合观测方程解算基准站双差宽巷整周模糊度,采用Saastamoinen模型和GMF映射函数模型相结合解算双差对流层干分量延迟残差,并将双差对流层湿分量延迟残差作为未知参数进行估计,同时结合无电离层组合观测值解算基准站双差载波整周模糊度;然后,采用综合误差内插法解算基准站和流动站的误差改正数;最后,采用最小二乘法逐历元进行法方程叠加解算流动站双差模糊度浮点解,并利用LAMBDA算法和通过TIKHONOV正则化改进的LAMBDA算法搜索固定流动站双差宽巷整周模糊度和双差载波整周模糊度。实验表明,该算法能够将基准站间距离提高到100~150km,使流动站用户可以获得厘米级定位结果。
[Abstract]:In order to solve the problem of high cost and difficult location of CORS system, this paper proposes a RTK location algorithm for GPS long distance network. In this algorithm, the ambiguity of double differential wide lane is solved by using the MW combined observation equation, and the Saastamoinen model and the GMF mapping function model are used to solve the delay residuals of the dry component in the troposphere. The delay residuals of the double differential troposphere are estimated as unknown parameters, and the integer ambiguity of the reference station is calculated by using the ionospheric combined observations. The error correction of the reference station and the current station is solved by the method of comprehensive error interpolation, and the floating point solution of double difference ambiguity of the mobile station is solved by the least square method, which is superposed by the ordinary equation by epoch. The LAMBDA algorithm and the improved LAMBDA algorithm based on TIKHONOV regularization are used to search the integer ambiguity of double differential wide lane and the integer ambiguity of double difference carrier in fixed mobile station. Experimental results show that the proposed algorithm can increase the distance between reference stations to 150 km, so that mobile station users can obtain centimeter level positioning results.
【作者单位】：辽宁工程技术大学测绘与地理科学学院;
【基金】：国家自然科学基金项目(41474020,41504010)
【分类号】：P228.4

【相似文献】