一种改进的网络RTK对流层延迟误差线性内插模型

AN IMPROVED NETWORK RTK TROPOSPHERE DELAY ERROR OF LINEAR INTERPOLATION MODEL

在网络RTK高精度定位中，流动站高程与参考站网络平均高程相差较大会造成双差大气延迟误差的内插误差较大，从而影响其正常的定位精度。在比较分析常规的线性内插模型（LIM）的基础上，提出了一种改进的线性内插模型，并利用美国CORS网络的四个参考站数据进行了实验分析。结果表明，改进模型较常规LIM模型其内插精度提高了大约1—2cm。

In the high precision network RTK positioning process, the large atmospheric delay interpolation er- ror will be caused by the elevation difference between the user station and the reference station network which would affect its normal positioning. By analyzing the conventional linear interpolation model, an improved linear interpola- tion model is presented. The improved model, for calculating troposphere double difference delay error correction accuracy between the user station and the main reference station pairs using the US CORS data, has increased about 1 to 2 cm.