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.
出处
《地震学报》
CSCD
北大核心
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
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
GPS
maximum likelihood estimator
common-mode errors
regional stacking
principal component analysis
mass loading
作者简介
通讯作者 e—mail：tianyf@eq-icd．cn
