青岛市连续运行基准站系统（QDCORS）稳定性分析

采用GAMIT/GLOBK软件，联合16个IGS站，处理青岛市连续运行基准站系统（QDCORS）2014~2015年2 a的观测数据，获取ITRF2008下区域网解，并进行坐标时间序列分析，得到QDCORS基准站总体位置变化趋势与周边陆态网站点一致，水平速度33.66 mm/a，方向为E19.62°S；通过固定1个基准站为参考，求得其他基准站的水平相对速度在1 mm/a左右，垂直相对速度低于5 mm/a。结合基准站周边环境情况分析异常站点的成因，初步确定造成QDCORS基准站异常的主要因素是多路径效应、工程施工。

Stability Analysis of Qingdao CORS Reference Stations

In this paper, GNSS observational data from the Qingdao continuously operating reference station system(QDCORS) from 2014 and 2015 are processed by GAMIT / GLOBK software combined with 16 IGS stations. The regional network calculation of ITRF2008 is acquired by time series analysis of coordinates.The variation trend between QDCORS and the surrounding stations of the crustal movement observation network of China is nearly consistent, with horizontal velocity of 34.41 mm/a in the direction of E19.62°S under ITRF2008. Using one fiducial station as a fixed reference, the velocity of other fiducial stations is around 1 mm/a horizontally and less than 5 mm/a vertically, which reflects the overall stability of QDCORS. Considering the environment of fiducial stations, the conclusion can be made that the main factors causing anabnormal fiducial station is the multipath effect of GNSS and urban construction procedures.