JLCORS观测站时间序列随机游走噪声幅度研究  

THE STUDY ABOUT RANDOM WALK NOISE AMPLITUDE OF TIME SERIES FROM JLCORS OBSERVATION STATION

作　　者：丁广[1] 刘俊清[1] 张晨侠[1] 

机构地区：[1]蒙城地震台,安徽蒙城233527

出　　处：《防灾减灾学报》2016年第1期64-68,共5页Journal of Disaster Prevention And Reduction

基　　金：地震科技星火计划项目编号(XH14016Y)资助

摘　　要：为获得JLCORS观测站坐标时间序列噪声特征,选取网内基岩站、土层站以及楼顶站三种不同类型的观测站作为研究对象,首先进行GNSS数据后处理获得站坐标时间序列,然后利用最大似然估计方法,进行参数估计,对时间序列中随机游走噪声的幅度进行研究。结果显示,基岩站具有最高的稳定性,随机游走噪声幅值约1.73 mm/yr1/2,土层稳定性最低,随机游走噪声幅值约2.24 mm/yr1/2,楼顶站稳定性介于其中,随机游走噪声幅值约2.19 mm/yr1/2。In order to obtain the noise characteristics of the coordinate time series of JLCORS observation station, three different types of observation stations are as the research object, the bedrock station, the soil layer station and the roof station, were selected to obtain the coordinate time series of GNSS data. Then the maximum likelihood estimation method was used to study the amplitude of random walk noise in time series. The results show that the bedrock station has the highest stability, the random walk noise amplitude is about 1.73 mm/yr1/2, the soil station stability is the lowest, the random walk noise amplitude is about 2.24 mm/yr1/2, the stability of the roof station is between them, and the random walk noise amplitude is about 2.19 mm/yr1/2.

关 键 词：GNSS时间序列 噪声 观测墩 

分 类 号：P315.61[天文地球—地震学]