摘要
为评价GPS、VLBI和SLR这 3种空间技术确定地心坐标的真正实现精度 ,我们把 3种技术在并置站上的地心坐标进行了相互比较。经过偏心改正和 7个参数的转换后 ,可获得任意 2种技术地心坐标不符值的加权中误差 ,以此作为外符精度。可以看出 ,VLBI与GPS地心坐标三分量的外符精度在 1cm之内 ,SLR与VLBI和GPS地心坐标三分量的外符精度在 1～ 3cm之间。表明VLBI和GPS实现的地心坐标精度比SLR高一些 ,已达毫米级。
In order to evaluate the real accuracy of the geocentric coordinates determined by GPS, VLBI and SLR, we compared their geocentric coordinates located on the same site. After eccentricity correction and transformation them into the same system, we can get weighted mean square error of differences between any two kinds of geocentric coordinates, which can reflect the real accuracy. The real accuracy of GPS and VLBI geocentric coordinates is within 1 cm, and the real accuracy of SLR geocentric coordinates is in 1～3 cm. Showing that the accuracy of the geocentric coordinates determined by GPS and VLBI is higher then SLR, better than 1 cm.
出处
《测绘学院学报》
2000年第1期12-15,共4页
Journal of Institute of Surveying and Mapping
