摘要
为评价GPS、VLBI、SLR三种空间技术确定地心坐标的实现精度,选择使用三种技术并置站上的坐标数据,在经历元统一、偏心改正和七参数转换之后,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中误差,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,可达到毫米级。
In order to evaluate the real accuracy of the geocentric coordinates determined by GPS, VLBI and SLR , we used their located on the same site. After calendar correction and eccentricity correction , we get the transformation parameters . The mean square error of difference between any two kinds of geocentric coordinates is analyzed, which can reflect the real accuracy . The results show that the accuracy of the coordinates determined by GPS and VLBI is higher than SLR , better than 1 mm.
出处
《海洋测绘》
2009年第2期31-34,共4页
Hydrographic Surveying and Charting
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
