南京CORS网的稳定性分析与研究

为了评估南京CORS（Continuously Operating Reference Stations）的稳定性，采集了CORS网中9个基准站的历史观测数据，采用GAMIT软件进行基线解算，经过基线解质量检核后，通过GLOBK软件进行三维约束平差，得到了各站点在ITRF14（International Terrestrial Reference Frame 14）框架下的三维坐标。基于以上坐标成果，本文对南京CORS的稳定性进行了综合评价。结果表明：南京CORS各站均随所在板块一起向东南方向移动，N方向速度约为-10 mm/y，E方向约为30 mm/y。并且，各站在高程方向上位置稳定，未发生明显变化。去除板块位移的影响后，CORS中各测站位置稳定，可为用户提供稳定精确的三维定位服务。

Stability Analysis and Research for Nanjing CORS Network

To evaluate the stability of Nanjing CORS, this paper collects the historical observations of 9 stations in the CORS, and uses GAMIT software to solve these baseline. After the quality check, we adopt GLOBK software to constrained adjustment. Then, we get the coordinates of each station in itrf14 framework. Based on the coordinate results, this paper evaluates the stability of Nanjing CORS. The results show that all stations in Nanjing CORS move to the southeast with the its plate. The velocity in north direction is about - 10 mm / y, while about 30 mm / y in east direction. In addition, each station is stable in the elevation direction. After removing the influence of plate displacement, the positions of each stations in Nanjing CORS are stable, which can provide users with stable and accurate three-dimensional positioning services.