云南境内陆态网络GNSS观测资料数据处理与初步结果

利用GAMIT/GLOBK软件对云南境内陆态网络GNSS观测资料,包括27个GNSS基准站自2011年至今的连续观测资料,以及170多个GNSS区域站2009、2011、2013年3期区域复测资料进行了处理,基线处理的重复性在水平方向优于1.79mm+1.1×10?9×S,在垂直方向优于5.99mm+1.46×10?9×S(S为基线长度,以mm为单位),计算得到了基线及点位时间序列和欧亚框架下的测站运动速度场。初步分析了坐标时间序列的变化规律,并利用刚体运动模型反演了云南地区各活动块体的现今地壳运动,初步结果表明云南地块运动方向逐渐由SSE向SSW变化,运动幅度由西向东、由北向南逐渐减弱,菱形块体外各个块体运动速度大幅衰减。该初步结果可为后期GNSS数据的进一步运用提供参考。

Data Processing and Preliminary Results of GNSS Observation based on CMONOC in Yunnan Province

The GNSS observation data in Yunnan region, including continuous observation data from 27 reference stations since 2011, and a total of three regional survey data from more than 170 regional stations between 2009 to 2013, were processed by using GAMIT/GLOBK. It is shown that the horizontal and vertical proportion errors of baseline repetition rates can reach up to 1.79mm+1.1×10-9 and 5.99mm+1.46×10-9, and time series of reference stations and velocity field relative to the Eurasian reference frame was obtained. The results indicate that the direction of crustal movement to the area changes from SSE to SSW gradually. The velocities of those blocks outside the rhombic block decrease swiftly. These preliminary results provide a reference for further use of the GNSS observation in Yunnan Province.