中文摘要：

随着GPS（Global Positioning System）定位技术应用的不断扩展，各地陆续建立GPS连续运行参考站，而参考站的分布稀疏、GPS基线较长，定位精度受到各种误差的影响。其中与距离有关的误差，尤其是对流层延迟使定位精度降低。为了满足GPS高精度定位的需要，文中利用普通克利金（Kriging）内插法精确确定了对流层延迟，通过消弱此影响来提高GPS长基线解算的精度，并通过实例证实了GPS定位精度的提高。

英文摘要：

With the expanding of application in GPS positioning technology, GPS reference stations of the continuous operation have been founded around the world. However,the positioning accuracy is related to different errors because of the sparse distribution of refer- ence points and GPS long base--line. Among the distance errors, especially in the tropospheric delay the positioning accuracy reduces. In order to meet the needs of the GPS positioning accuracy,the precise tropospheric delay is computed by ordinary Kriging interpolation in this article. The accuracy of the solution will be improved by means of weakening the tropospheric delay. Finally examples are adopted to confirm the improvement of GPS positioning precision.