VLBI与GPS地心坐标的精度检测

Accuracy Determination of GPS and VLBI Geocentric Coordinates

为了评价GPS与VLBI这两种空间技术测定的地心坐标的真正实现精度,选择使用它们的并置站坐标数据,在进行了历元改正和偏心改正后,计算了这两种技术实现的参考架的转换参数,并分析了它们坐标不符值的中误差,得出GPS与VLBI这两种技术实现的参考架的外符合精度在1cm之内,表明了GPS与VLBI这两种技术测定的地心坐标精度已经达到毫米量级。

In order to evaluate the real accuracy of the geocentric coordinates determined by GPS and VLBI, we used their data located on the same site. After calendar correction and eccentricity correction, we can get the transformation parameters, analyze the mean square error of differences between the two geocentric coordinates,and educe the real accuracy of GPS and VLBI within l cm, which shows that the precision of geocentric coordinates determined by GPS and VLBI reaches millimeter level.