中国地壳运动观测网络的海潮位移改正系数

大型GPS分析软件包GAMIT从10.0以上版本开始，正式采用由瑞典Onsala空间观测站Mr.H.G.Scher-neck提供的海潮位移改正系数表stations.oct,用来计算GPS测站的海潮位移改正，但是系数表中只包含少数中国的IGS站，不能满足国内高精度大地测量，特别是地壳形变监测等数据处理的需要，为此，利用NAO99b全球海潮模型和基于1066A地球模型的格林函数，计算了中国地壳运动观测网络全部25个基准站的海潮位移改正系数，将计算得到的系数替换或补充到原有的stations,oct文件中，就可以在计算海潮位移改正时减少测站坐标内插所带来的误差，提高GPS数据处理的精度。

Coefficients of Ocean Tidal Displacement Corrections for China Crust Movement Observatory Network

From version 10.0, the GPS analysis software package - GAMIT began to use the coefficients table of ocean tidal displacement corrections - stations, oct, provided by Mr. H. G. Scherneck of Onsala Space Observatory, to calculate ocean tidal displacement corrections for GPS stations. But this table just includes few IGS stations of China, and it can't meet the needs of precise geodesy data processing in China, especially for the monitoring of crust deformation. So, using NAO99b global ocean tide model and Green's functions based on 1066A earth model,the coefficients of ocean tidal displacement corrections for 25 reference stations of China Crust Movement Observatory Network are calculated. By replacing or adding these coefficients into the stations . oct file, the errors brought out by the interpolation of station' s coordinates can be reduced when calculating the ocean tidal displacement corrections,so as to increase the precision of GPS data processing.