陆态网络GNSS基准站阶跃偏移量的精确估计

通过对发生阶跃的GNSS基准站坐标序列谱指数的求解，表明了其具有有色噪声的特性，并对三分量分别建立了最优噪声模型，以此对GNSS基准站坐标的阶跃偏移量进行了精确估计，探明了地震和仪器更换对测站产生的精细影响。同时利用求解的阶跃偏移量对坐标序列进行修正，对获取连续性变化的测站坐标序列和获取精确的测站三维运动参数具有重要意义。

The Accurate Estimation of the Step Offset of CMONOC GNSS Fiducial Station

It is represented that the spectral index of GNSS fiducial station coordinate series have characteristics of colored noise by calculation of spectral index with step offset. The optimal noise model of three component is establi- shed respectively and the step offset of GNSS fiducial station coordinate is estimated accurately, which proves the fine effects to observation stations caused by the earthquake and the instrument replacement. The coordinate series is corrected by the step offset solved, which is of great significance to obtain the continuous station coordinate series and the accurate 3D motion parameters of stations.