引用本文: 祝会忠, 路阳阳, 徐爱功, 李军. 长距离GPS/BDS双系统网络RTK方法[J]. 武汉大学学报 ( 信息科学版), 2021, 46(2): 252-261.
ZHU Huizhong, LU Yangyang, XU Aigong, LI Jun. A Network Real-Time Kinematic Method for GPS and BDS Double Systems Between Long Range[J]. Geomatics and Information Science of Wuhan University, 2021, 46(2): 252-261.
 Citation: ZHU Huizhong, LU Yangyang, XU Aigong, LI Jun. A Network Real-Time Kinematic Method for GPS and BDS Double Systems Between Long Range[J]. Geomatics and Information Science of Wuhan University, 2021, 46(2): 252-261.

## A Network Real-Time Kinematic Method for GPS and BDS Double Systems Between Long Range

• 摘要: 基于区域参考站网的网络实时动态定位(real-time kinematic，RTK)方法是实现全球定位系统（global positioning system，GPS）、北斗卫星导航系统（BeiDou satellite navigation system，BDS）高精度定位的主要手段。研究了一种长距离GPS/BDS双系统网络RTK方法，首先采用长距离参考站网GPS/BDS多频观测数据确定宽巷整周模糊度，利用引入大气误差参数的参数估计模型解算GPS/BDS双差载波相位整周模糊度；然后按照长距离参考站网观测误差特性的不同，分类处理参考站观测误差，利用误差内插法计算流动站观测误差，以改正流动站GPS/BDS双系统载波相位观测值的观测误差；最后使用流动站多频载波相位整周模糊度解算方法确定GPS/BDS载波相位整周模糊度并解算位置参数。使用长距离连续运行参考站(continuously operating reference stations，CORS)网的实测数据进行实验，结果表明，该方法能够利用长距离GPS/BDS参考站网实现流动站的厘米级定位。

Abstract: The uncertainty of distance-related error of global navigation satellite system is gradually increasing with the increase of distance between the reference stations and the rover station. Therefore, the dual-systems of global positioning system (GPS) and BeiDou satellite navigation system (BDS) network real-time kinematic (RTK) method was presented to meet the demand of high-precision long range positioning RTK. Firstly, the wide-lane ambiguities were fixed by the multi-frequency observation data of GPS and BDS between long-range reference stations. The satellite clock errors can be eliminated by the double-difference solution model, simultaneously the atmospheric error and satellite orbit errors can be weakened. Then the double-difference carrier phase integer ambiguities can be fixed by the resolution model including atmospheric error and carrier phase ambiguity. The method of classification error corrections between long-range reference stations network was used. The observation errors were classified, according to the characteristics of observation errors between long-range reference station network. The ionosphere errors and non-dispersive errors of the rover station were calculated by using the reference stations' error correction and regional error interpolation. The atmospheric errors and satellite orbit errors of the rover station can be weakened by the method of interpolation. Then the errors of GPS/BDS carrier phase observation of the rover station were removed by the calculation errors. The carrier phase integer ambiguities of the rover station can be fixed by the method of resolution integer ambiguity with multi-frequency carrier phase, and the position of the rover station was obtained by the fixed ambiguities. The algorithm validation was carried out by the data on long-range reference station network. Three long-range reference stations and one rover station were used to test in Central China. The positioning accuracy of centimeter can be obtained by the algorithm of dual-systems of GPS and BDS network RTK. At the same time, single system can also get the centimeter level of position and the GPS is better than BDS. The method of dual-systems of GPS and BDS network RTK can guarantee the positioning accuracy of the rover station. The results of experiment indicate that the GPS/BDS long-range network RTK can be realized and the centimeter level positioning accuracy can be achieved by this algorithm.

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