利用2015至2016年GNSS观测数据进行天津CORS基准站速度场分析

Velocity Analysis of Tianjin CORS Stations Based on GNSS Data During Period 2015 and 2016

选用天津CORS中13个基准站2015年~2016年两年的GNSS观测数据,利用数据处理软件GAMIT/GLOBK进行解算,得到了天津CORS基准站在ITRF2008框架下的三维速度场。结果表明,天津CORS整体在水平方向上有东南向运动趋势,平均速率为33.46 mm/年,优势方向为SEE109.79°。垂直方向上,除JIXN基准站表现出小幅隆升趋势外,其他基准站均有不同程度的沉降,其中天津西南部沉降较严重,位于北辰的基准站QING沉降速率最大,达到了69.55 mm/年。

GNSS data of 13 stations from Tianjin continuously operating reference stations（CORS）,during the period of 2015 ~ 2016,were processed with GAMIT/GLOBK software,and Tianjin＇s three dimensional velocity field under the ITRF2008 reference frame was worked out.Results show that in the horizontal direction,Tianjin CORS has the movement trend of southeast at the mean velocity 33.46 mm/yr,in the dominant direction of SEE109.79°.As for the vertical velocity,all stations have subsidence behavior except that JIXNstation has a slightly uplift.Moreover,the stations in southwest part of Tianjin have higher settling velocity rate than the rest,among which station QING has the biggest settling velocity of 69.55 mm/yr.