利用GPS和常规技术进行空间归心测量

The Dtermination of Space Coordinate Difference with GPS and Traditional Surveying

上海天文台的佘山VLBI、SLR和GPS站是国际上用以建立和维持地球参考系进行全球动力学研究的基准台站，联合应用这些空间测量，需要知道这三个站心间的三维相对位置。本文采用GPS技术及常规的方向、距离、精密水准测量对三个站进行了空间归心测量，文中介绍了布网、观测和计算方法，得到的归心结果在坐标分量上能达到2cm的外附精度。

The VLBI,SLR and GPS stations of Shanghai Observatory are international fiducial stations used for establishing and maintaining global reference frames and for studying global geodynamics. The relative positions of these three stations are necessary in the combination use of their different techniques. To determine the rela Live positions of them, the GPS technique, traditional direction, range survey andprecise levelling are adopted here and the network design, observation plan and adjustment method are introduced. The accuracy of space coordinate differences is about 2cm.