陕西连续GPS基准站坐标时间序列分析

STUDY ON COORDINATE TIME SERIES OF SHAANXI CONTINUOUS GPS REFRENCE STATIONS

对陕西省GPS连续基准站2011-01-01～2013-05-30坐标时间序列进行分析,利用区域叠加滤波分离出共模误差,滤波后站坐标时间序列N、E、U方向的平均均方根分别减小69%、60%和41%。通过谱指数计算发现,空间滤波后的时间序列含有白噪声和有色噪声;利用CATS软件对各噪声分量估计发现,垂直方向噪声分量大于水平方向;空间滤波使闪烁噪声大幅减小,部分站出现随机漫步噪声。

The data of the Shaanxi continuous GPS reference stations from Jan 1 st ,2011 to May 30th,2013 arc computed and analyzed in this article. After common mode error being removed by the regional stacking, the mean RMS of coordinate time series are declined 69% ,60% and 41% respectively in N, E, U directions. The spectral in- dexes analysis states that the after-fihered coordinate time series contain the white noise and the color noise . The CATS software analysis indicates that the noise components of vertical direction are much larger than those of horizontal direction, and random noise appear in some stations along with flicker noise being decreased by the spatial filtering.