GPS坐标时间序列中非构造噪声的剔除方法研究进展  

Progress on reduction of non-tectonic noise in GPS position time series

作　　者：田云锋[1,2] 沈正康[1,3] 

机构地区：[1]中国地震局地质研究所,地震动力学国家重点实验室,中国北京100029 [2]中国地震局地壳应力研究所,中国北京100085 [3]Department of Earth and Space Science,University of California,Los Angeles,CA 90095-1567,USA

出　　处：《地震学报》2009年第1期68-81,117,共14页Acta Seismologica Sinica

基　　金：国家重点基础研究发展规划项目(2004CB418403);基本科研业务费专项(ZDJ2007-13)资助

摘　　要：GPS台站坐标解算中包含多种地球物理参量造成的不确定性、系统误差和随机噪声.回顾了GPS台站坐标噪声分析的研究进展,包括功率谱分析、最大似然估计、区域叠加滤波、主成分变换以及质量负荷下的地壳弹性形变模拟等,并讨论了各种方法在分析噪声的类型和强度、共模误差(common-mode errors)的物理起源等方面的作用及局限性,展望了下一阶段的研究思路.There are multiple noise origins for GPS position time series, including deformation due to geophysical phenomena, system errors, and random noises. In this paper, various currently used methods to analyze and reduce nontectonic noises are presented, such as power spectrum analysis, maximum likelihood estimator, regional stacking, principal component analysis, and deformation modeling under the loading of surface water/atmosphere mass. These methods are useful in deriving the spectral indices and amplitudes of colored noises, and helping understand the physical sources of the common-mode errors.The pros and cons of various techniques, as well as the future research directions, are also discussed.

关 键 词：GPS 最大似然估计 共模误差 区域叠加滤波 主成分分析 质量负荷 

分 类 号：P315.3[天文地球—地震学]