| 长距离网络RTK实时厘米级定位算法 |
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| 引用本文： | 马天明,王建敏,祝会忠.长距离网络RTK实时厘米级定位算法[J].测绘科学,2017(12):157-162. |
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| 作者姓名： | 马天明 王建敏 祝会忠 |
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| 作者单位： | 辽宁工程技术大学测绘与地理科学学院,辽宁阜新,123000 |
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| 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。
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| 关 键 词： | GPS定位 网络RTK 长距离 整周模糊度 误差改正 |
Algorithm of long-range network RTK centimeter level positioning |
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| Abstract: | For high cost and difficulty in location of building CORS system,this paper proposed long-range network RTK positioning algorithm.This algorithm first used the MW combined observation equation to solve the ambiguities of the double difference wide lane of the base stations,then the Saastamoinen model and the GMF mapping function model were used to solve the dry component delay residual of double differential troposphere,and then the wet component delay residual of double differential troposphere was estimated as unknown parameters,at the same time,the ambiguities of the double difference carrier of the base stations wre calculated by combining observation values without ionospheric combination;then the integrated error interpolation method was used to solve the base stations and the mobile stations error corrections;finally,the least squares method and equation superposition by epoch were used to estimate the ambiguity float solution,then the LAMBDA algorithm and the improved algorithm LAMBDA by TIKHONOV regularization were used to search and fix integer ambiguity resolution of wide lane and carrier,and then the mobile station centimeter positioning results were got,experiments showed that the algorithm could improve the distance between the base stations to 100～ 150 km,so that mobile station users can get centimeter level positioning results. |
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| Keywords: | GPS positioning network RTK long-range integer ambiguity error corrections |
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