基于CATS软件的连续运行参考站噪声分析

Noise Analysis of Continuously Operating Reference Stations Based on CATS

基于深圳市5个连续运行参考站(continuously op-erating reference stations,CORS)2010~2015年观测数据,采用PANDA软件非差数据处理策略解算获得各参考站单日解坐标时间序列,并利用CATS软件对选用的不同噪声模型组合求取最大似然估计值,根据保守估计准则判断各组模型的优劣,进而确定最优模型。结果表明,深圳CORS站噪声的特征主要表现为闪烁噪声和白噪声叠加(PL+WH),从地表负载增大的角度解释了南山站坐标时间序列中有存在随机游走噪声的可能性。

Based on the observation data of five CORS sta- tions in Shenzhen during the period of 2010to 2015,the software PANDA is employed to compute the single-day so- lution under the mode of non-differential processing to ac- quire the coordinate time series.Based on the time series of different stations and coordinate components,the software CATS calculates the MLE values of selected noise combina- tions to get an optimal noise model among them according to a conservative estimate criterion.The result shows that the main noises in Shenzhen CORS stations are the combination of flick noise and white noise.From the perspective of the increased surface mass loading,it is likely that there is ran- dom noise in the coordinate time series of Nanshan station.