基于CATS软件的连续运行参考站噪声分析
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摘要
基于深圳市5个连续运行参考站(continuously operating 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 stations in Shenzhen during the period of 2010 to 2015,the software PANDA is employed to compute the single-day solution under the mode of non-differential processing to acquire 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 combinations 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 random noise in the coordinate time series of Nanshan station.
Based on the observation data of five CORS stations in Shenzhen during the period of 2010 to 2015,the software PANDA is employed to compute the single-day solution under the mode of non-differential processing to acquire 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 combinations 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 random noise in the coordinate time series of Nanshan station.
引文
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[2] Mao Ailin,Harrison C G A,Dixon T H.Niose in GPS Coordinate Time Series[J].Journal of Geophysical Research:Solid Earth,1999,104(B2):2 797-2 816
[3]韩英,符养.GPS高程数据时间序列分析[J].武汉大学学报·信息科学版,2003,28(4):425-428
[4]乔学军,王琪,吴云,等.中国大陆GPS基准站的时间序列特征[J].武汉大学学报·信息科学版,2003,28(4):413-416
[5]徐北海,徐旭,刘淑官,等.时间序列分析方法在变形数据处理中的应用研究[J].测绘地理信息,2016,41(1):61-64
[6] Nikolaidis R.Observation of Geodetic and Seismic Deformation with the Global Positioning System[J].Cancer Research,2002,71(8):714
[7]黄立人.GPS基准站坐标分量时间序列的噪声特性分析[J].大地测量与地球动力学,2006,26(2):31-33
[8] Langbein J.Noise in Two-Color Electronic Distance Meter Measurements Revisited[J].Journal of Geophysical Research:Solid Earth,2004,109(B4):1-16
[9] Williams S,Bock Y,Fang P,et al.Error Analysis of Continuous GPS Position Time Series[J].Journal of Geophysical Research:Solid Earth,2004,109(B3):412-430
[10]李昭,姜卫平,刘鸿飞,等.中国区域IGS基准站坐标时间序列噪声模型建立与分析[J].测绘学报,2012,41(4):496-503
[11]Zhang J,Bock Y,Johnson H,et al.Southern California Permanent Geodetic Array:Error Analysis of Daily Position Estimates and Site Velocities[J].Journal of Geophysical Research:Solid Earth,1997,102(B8):18 035-18 055
[12]Williams S D P.CATS:GPS Coordinate Time Series Analysis Software[J].GPS Solutions,2008,12(2):147-153
[13]Chen Wu,Gao Shan,Hu Congwei,et al.Effects of Ionospheric Disturbances on GPS Observation in Low Latitude Area[J].GPS Solutions,2008,12(1):33-41
[14]Langbein J.Noise in GPS Displacement Measurements from Southern California and Southern Nevada[J].Journal of Geophysical Research:Solid Earth,2008,113(B5):1-12