长距离网络实时动态对流层延迟误差改正

Error correction of troposphere delay for long range network RTK

针对长距离网络RTK的范围较大,造成区域观测误差的相关性降低,影响对流层延迟误差的内插计算和改正这一情况,该文提出了一种改进的对流层延迟误差计算和改正方法。首先利用确定的参考站网整周模糊度和载波相位观测值计算各参考站的天顶对流层延迟,然后将各参考站天顶对流层延迟误差播发给流动站用户,用户根据内插模型内插计算出流动站处的天顶对流层延迟误差,并进行流动站各卫星的对流层延迟误差计算和改正。通过长距离CORS网实测数据的实验证明,该文方法可以取得理想的长距离网络RTK误差改正效果和流动站定位结果。

Aiming at the situation that long range network RTK reduces the correlation of regional observation error and has influence on the interpolation calculation and correction of troposphere delay error, a proved method which was used to calculate and correct troposphere delay was proposed. Firstly, the zen- ith troposphere delays of base stations were calculated by the fixed integer ambiguities of base station net- works. Then the zenith troposphere delay of rover was calculated by the interpolation model. And the trop- osphere delay calculating and correcting of each satellite on rover could be realized. The test results by the data of long range CORS indicated that the satisfactory error correction effect and positioning results on rover with long range networks RTK could be obtained by the proved algorithm.