摘要
为评价GPS、VLBI、SLR三种空间技术确定地心坐标的真正实现精度,选择使用它们的并置站上坐标数据,在进行经历元统一,偏心改正和7参数转换之后,计算了这三种技术实现的参考架的转换参数,得到了任意两种技术地心坐标不符值的加权标准差,以此作为外符精度。经分析可知VLBI与GPS实现的地心坐标比SLR高一些,达到毫米级。
In order to evaluate the real accuracy of the geocentric coordinates determined by GPS 、 VLBI and SLR , coordinate data on the same site are used.After calendar correction and eccentricity correction , the transformation parameters are obtained by analyzing the mean square error of difference between any two kinds of geocentric coordinates.The results show that the accuracy of the coordinates determined by GPS and VLBI is higher than by SLR , which is in the millimeter level.
出处
《导航定位学报》
2013年第2期20-24,共5页
Journal of Navigation and Positioning
关键词
空间技术
地心坐标
标称精度
外符精度
space geodetic technologies
geocentric coordinate
marker precision
real accuracy
