空间大地测量技术实测台站速度场精度分析

利用国际上3个著名的数据分析处理中心CSR、JPL和GSFC给出的3种空间大地测量技术实测的台站运动速度场数据,解算不同空间技术速度场之间的转换参数,即速度场之间的系统差。在扣除两两技术之间速度场的系统差后,用速度场残差计算了空间技术速度场之间的不符值加权中误差作为衡量不同空间技术实测台站速度场的外部检核指标,即外符精度。计算结果表明,VLBI和GPS实测台站地心速度已经达到1 mm/a的精度;SLR实测台站地心速度已经达到2 mm/a的精度。

Analysis on Accuracy of Site Velocity Field Measured by Spatial Geodetic Technique

In this paper,the data comes from three famous international data analysis centers which are CSR,JPL and GSFC.The transformation parameters,namely the systematic errors were solved between various velocity fields using the site velocity field data measured by spatial geodetic techniques.While offsetting the systematic errors,the inconsistent weighted root mean scatter(WRMS) was also calculated between velocity fields.Then the inconsistent WRMS was judged as the external examine index also named the real accuracy.It was indicated that the real accuracy of velocity field by GPS or VLBI reached 1 mm/a,and SLR 2 mm/a.