两种空间技术实现独立地球参考架地心坐标的精度分析  

ACCURACY OF GEOCENTRIC COORDINATES DETERMINED BY TWO KINDS OF SPACE TECHNIQUE

作　　者：李超[1] 孙付平[1] 朱陵凤[1] 王爱兵[1] 

机构地区：[1]信息工程大学测绘学院,郑州市陇海中路66号450052

出　　处：《测绘信息与工程》2007年第1期44-45,共2页Journal of Geomatics

摘　　要：在并置站上对GPS和VLBI两种空间技术测定的地心坐标进行了比较,经过历元统一、偏心改正和七个转换参数之后,得到了两种空间技术地心坐标之间的不符值,其可以认为是这两种空间技术的真正实现精度,这两种地心坐标三个坐标轴方向分量的外符精度都在1 cm之内,试验说明了GPS和VLBI确定的地心坐标已达到毫米级。In order to evaluate the real accuracy of the geocentric coordinates determined by GPS and VLBI,two kinds of geocentric coordinates are compared located on the same site. The difference between two kinds of geocentric coordinates can be obtained by eccentricity correction and transforming them into the same system. The difference can be regarded as the real accuracy of realization. The real accuracy of GPS and VLBI geocentric coordinates is within 1 cm. This shows that the accuracy of determined by GPS and VLBI is better than 1 cm.

关 键 词：全球定位系统 甚长基线干涉 地心坐标 外符精度 

分 类 号：P228[天文地球—大地测量学与测量工程]