新疆陆态网络坐标时间序列噪声模型分析  

Noise model analysis of coordinate time series for Xinjiang CMONOC

作　　者：隋哲民 李建章 佟雪佳 高志钰 SUI Zhemin;LI Jianzhang;TONG Xuejia;GAO Zhiyu(Faculty of Geomatics,Lanzhou Jiaotong University/National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring/Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou,Gansu 730070,China;State Key Laboratory of Earthquake Dynamics,Institute of Geology of China Earthquake Administration,Beijing 100029,China)

机构地区：[1]兰州交通大学测绘与地理信息学院/地理国情监测技术应用国家地方联合工程研究中心/甘肃省地理国情监测工程实验室,兰州730070 [2]中国地震局地质研究所地震动力学国家重点实验室,北京100029

出　　处：《导航定位学报》2021年第4期32-39,共8页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41661091);兰州交通大学优秀平台支持项目(201806)。

摘　　要：针对新疆地区陆态网络建立较晚,导致速度场研究中观测周期短且易忽视坐标时间序列有色噪声的问题,提出一种确定最优噪声模型的方法:选取新疆境内31个陆态网络连续站10 a的观测数据,确定3个方向分量的最优噪声模型类型及各自所占比重;然后得出最优噪声模型以及修正后的速度场。结果表明:新疆坐标时间序列数据中主要存在白噪声(WN)、闪烁噪声(FN)和高斯马尔可夫噪声(GGM);N方向的最优噪声模型主要为WN/GGM,E和U方向的最优噪声模型均为WN/FN;在新疆陆态网络时间序列研究中不可忽视有色噪声,考虑有色噪声最优模型修正后的速度场精度优于未修正的速度场。Aiming at the problem that it is liable to short observation period and neglect of colored noise in the coordinate time series due to the late establishment of the Xinjiang crustal movement observation network of China(CMONOC)stations for the study of velocity field,the paper proposed a method for determining the optimal noise model:measurement data of 10 years from 31 terrestrial network continuous stations in Xinjiang were selected,and the optimal noise model types of the three directional components and their respective proportions were determined;then the optimal noise model and the corrected velocity field were given finally.Results showed that:white noise(WN),flicker noise(FN)and Gauss Markov noise(GGM)would mainly present in the Xinjiang coordinate time series data;the optimal noise model in the N direction would be mainly WN/GGM,and the E and U directions would both have the optimal noise model WN/FN;moreover,colored noise can not be ignored in the study of Xinjiang CMONOC time series,and the accuracy of the velocity field corrected by the optimal noise model would be better than that of the uncorrected velocity field.

关 键 词：全球卫星导航系统 时间序列分析 大陆构造环境监测网络 贝叶斯数值分析法 噪声模型 速度场 

分 类 号：P228[天文地球—大地测量学与测量工程]