摘要 利用全球并置站GPS、SLR、VLBI测站坐标垂向残差序列进行测站周年规律的分析比较，通过比较发现三种空间技术计算得到的周年规律具有一定的相似性；但振幅相差较大，其中SLR与VLBI技术计算得到的周年振幅基本相同，与GPS技术相差较大，最大约7 mm 。推测该误差与GPS本身周年系统性误差有关。
Abstract：This paper makes comparison among seasonal nonlinear variations of site coordinates of GPS,SLR and VLBI with the collocation site’s coordinate vertical residuals. There is some comparability with those seasonal movements calculated by three space technologies. But the amplitude of vibration is different. The amplitude of vibration calculated with SLR is nearly the same with VLBI, but different with GPS, the maximum difference is about 7mm. And the errors may be related to the GPS seasonal systematic error.
