摘要
对山西CORS近2年的数据进行处理,获取了各基准站的坐标时间序列,并利用CATS软件使用最大似然估计法对CORS基准站坐标时间序列的噪声的特征进行分析,结果表明:1)CORS基准站坐标时间序列不仅有白噪声,也有有色噪声;2)CORS基准站坐标时间序列在N、E、U方向所含的噪声类型并不完全一致,其中,N、E方向的最佳噪声模型为WN+FN,U方向的最佳噪声模型为WN+FN+RWN;3)在使用CORS基准站坐标时间序列拟合速度值时,为获取正确的速度估值,不仅需要考虑白噪声,而且需要顾及有色噪声的影响。
The data of Shanxi region CORS nearly two years are processed and then Shanxi CORS sites coordinates time series can be abtained subsequently.For the work,the CATS software is used to analyzed the noise characteristics of sites coordinates time series with Maximum Likelihood Estimation（MLE） and following useful conclusions are drawn.Firstly,there are not only white noise but also colored noise in CORS coordinates time series.Secondly,the noise model in the directions N,E,U of CORS coordinates time series is not identical.In the N,E direction,the ＂WN ＋ FN＂ noise model is oplimum and the ＂WN ＋ FN ＋ RWN＂ noise model in the U direction.Finally,when CORS coordinates time series are used to fit velocity,not only white noise but also colored noise should be considered for more correct relocity valuations.
出处
《大地测量与地球动力学》
CSCD
北大核心
2012年第4期61-66,共6页
Journal of Geodesy and Geodynamics
关键词
山西CORS
坐标时间序列
CATS软件
最大似然估计法
噪声特征
Shanxi region CORS
coordinates time series
CATS software
Maximum Likelihood Estimation（MLE）
noise characteristics
