中国大陆GNSS连续站观测噪声的时空分布

为了全面分析我国大陆及其周边GNSS连续站噪声的空间分布规律,该文基于陆态网络260个GNSS连续站和周边区域10个IGS站的观测数据,利用GAMIT/GLOBK软件进行解算,得到各站的坐标值及其N、E、U 3分量误差值,制定筛选标准,依据该标准剔除质量差的测站,剔除异常值;利用Matlab软件,按照东向(E分量)、北向(N分量)、垂向(U分量)3个方向进行拟合,并提取各测站单日解的最大误差值出现的年积日,绘制其在我国大陆的空间分布图,得到中国大陆GNSS连续站最大单日误差值的时空分布特性图。发现大部分GNSS连续站单日最大误差值集中在夏季(7月居多)并分析了原因。

Temporal and spatial distribution of observation noise in GNSS continuous stations of mainland China

In order to analyze the spatial distribution of noise in China mainland and its surrounding continuous GNSS stations,based on the CMONOC 260 GNSS continuous stations and surrounding area 10 IGS stations observation data,the coordinates of each station and the error value of three components N,E,U were calculated by GAMIT/GLOBK software.The screening standards were formulated,based on which the standard stations with poor quality were removed and outliers were excluded;The data was fitted using Matlab software in three directions:north (N component),east (E component) and vertical (U component),the day of year of each station was fitted and extracted when the maximum single day error showed,the distribution map of the mainland of China was drawn,GNSS continuous temporal and spatial distribution map of China mainland was got.It was found that most of the GNSS continuous station single day maximum error values were concentrated in the summer(mostly in July)and the causes were analyzed.