长距离GPS/BDS参考站网多频载波相位整周模糊度解算方法

doi:10.11947/j.AGCS.2020.20190191

摘要/Abstract

摘要： 长距离网络RTK是实现GPS/BDS高精度实时定位的主要手段之一，其核心是长距离参考站网GPS/BDS整周模糊度的快速准确确定。本文提出了一种长距离GPS/BDS参考站网载波相位整周模糊度解算方法，首先利用GPS双频观测数据计算和确定宽巷整周模糊度，同时利用BDS的B2、B3频率观测值确定超宽巷整周模糊度。然后建立GPS载波相位整周模糊度和大气延迟误差的参数估计模型，附加双差宽巷整周模糊度的约束，解算双差载波相位整周模糊度，并建立参考站网大气延迟误差的空间相关模型。根据B2、B3频率的超宽巷整周模糊度建立包含大气误差参数的载波相位整周模糊度解算模型，利用大气延迟误差空间相关模型约束BDS双差载波相位整周模糊度的解算。克服了传统的使用无电离层组合值解算整周模糊度的不利影响。采用实测长距离CORS网GPS、BDS多频观测数据进行算法验证，试验结果证明该方法可实现长距离参考站网GPS/BDS载波相位整周模糊度的准确固定。

关键词: GPS, BDS, 长距离参考站网, 多频整周模糊度, 对流层延迟误差, 电离层延迟误差

Abstract: The method of long range network RTK is the main means to improve the accuracy of real-time kinematic positioning of GPS/BDS. The fast fixing of carrier phase integer ambiguity with GPS/BDS between long range reference stations was significant. The algorithm of multi-frequency carrier phase integer ambiguity resolution with GPS/BDS between long range network RTK reference stations was studied in this paper. The GPS wide-lane ambiguities were fixed by the double frequency observation data of reference station network. And the extra-wide-lane ambiguities of B2 and B3 frequency were fixed by using B2 and B3 frequency observation data at the same time. Then the solution model including GPS double difference carrier phase integer ambiguities and atmospheric errors can be established, the carrier phase integer ambiguity can be fixed by this solution model and the constraint of wide-lane ambiguities. Then the spatial correlation model of atmospheric delay error was established. And the computation model of BDS double difference carrier phase integer ambiguity including atmospheric delay error was established by the extra-wide-lane ambiguities of B2 and B3 frequency. The BDS carrier phase integer ambiguity resolution was constrained by the spatial correlation model of atmospheric errors. Therefore the influence of ambiguities fixing by using ionosphere free observation can be eliminated. The test of the algorithm was carried out by the GPS/BDS data with long range reference station network. The results of experiment indicate that the rapidly fixing of carrier phase integer ambiguity with GPS/BDS between long range reference stations was achieved by this algorithm.

Key words: GPS, BDS, long range reference stations, multi-frequency integer ambiguity, tropospheric delay error, ionospheric delay error

中图分类号:

P288

祝会忠, 李军, 蔚泽然, 张凯, 徐爱功. 长距离GPS/BDS参考站网多频载波相位整周模糊度解算方法[J]. 测绘学报, 2020, 49(3): 300-311.

ZHU Huizhong, LI Jun, YU Zeran, ZHANG Kai, XU Aigong. The algorithm of multi-frequency carrier phase integer ambiguity resolution with GPS/BDS between long range network RTK reference stations[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(3): 300-311.

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