测站坐标阶跃对参考框架稳定性的影响分析  

The analysis of the impact of the station coordinate offsets on the reference frames stability

作　　者：马一方 周晓慧[2] 华培学 MA Yifang;ZHOU Xiaohui;HUA Peixu(Beijing Earthquake Agency,Beijing 100080,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]北京市地震局,北京100080 [2]武汉大学测绘学院,武汉430079

出　　处：《测绘科学》2021年第10期20-24,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41874007);中国地震局震情跟踪定向任务(2021010201);湖北省自然科学基金项目(2019CFB468)。

摘　　要：针对全球卫星导航系统(GNSS)测站坐标阶跃对参考框架稳定性的影响量级尚不明确的问题,该文选取了340个全球分布的国际GNSS服务(IGS)测站建立长期GNSS参考框架。其中,测站运动模型包含线性速度、周年信号以及震后形变改正。通过迭代增加阶跃的数量,定量分析了测站坐标阶跃对建立的GNSS参考框架稳定性、测站速度及周年振幅的影响。结果表明,340个IGS测站坐标时间序列中存在的阶跃对建立的GNSS参考框架稳定性、测站水平方向速度以及测站周年振幅的影响量级均小于其精度,但是对测站垂直方向速度的影响较为显著。Aiming at the problem that the magnitude of the impact of offsets in the global navigation satellite system(GNSS)coordinates has not been clear,this paper selected 340 International GNSS Service(IGS)stations globally and realized secular GNSS reference frames with the station motion model including linear velocities,annual signals and post-seismic deformation correction.This paper assessed the magnitude of the impact by injecting progressively larger numbers of artificial offsets in terms of the GNSS reference frames stabilities,velocities and annual amplitudes quantitatively.The results showed that the magnitudes of the impact of 340 IGS station coordinate time series offsets on the GNSS reference frames stabilities,horizontal velocities and annual amplitudes were less than their precisions,but the vertical velocity estimates were more seriously affected.

关 键 词：全球卫星导航系统 坐标阶跃 参考框架稳定性 时间序列分析 

分 类 号：P228[天文地球—大地测量学与测量工程]