全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

汶川地震前后四川区域GPS时序特征演变及统计分析

DOI: 10.6038/cjg20130418, PP. 1237-1245

Keywords: 汶川地震,噪声分量,最大似然估计,幂律噪声,统计分析

Full-Text   Cite this paper   Add to My Lib

Abstract:

为探索地震事件对GPS坐标时间序列的长周期影响,对汶川地震前后四川GPS观测网络长约10年的解算成果进行了多参数模型噪声特征分析.基于最大似然估计方法和频谱特性分析,提取了地震前后各测站坐标序列中的噪声分量,使用Λ-统计检验,得出"白噪声+闪烁噪声"模型可以作为四川GPS区域观测网络的最优噪声组合模型,同时,地震事件使得地震前后GPS噪声分量中的白噪声、闪烁噪声、随机游走噪声等发生显著改变,说明传统谱噪声分析中简单地将地震数据拼接在一起并进行统一处理的模式并不可取;使用共模误差分析方法、区域速度场变化趋势等信息对地震前后噪声模型的改变成因进行了初步的物理解析.

References

[1]  Mao A L, Harrison C G A, Dixon T H. Noise in GPS coordinate time series. J. Geophys. Res., 1999, 104(B2): 2797-2816,.
[2]  Johnson H, Agnew D C. Monument motion and measurements of crustal velocities. Geophys. Res. Lett., 1995, 22(21): 2905-2908.
[3]  Johnson H, Agnew D C. Correlated noise in the geodetic time series, U.S. Geol. Surv. Final Tech. Rep., 2000.
[4]  Williams S D P, Bock Y, Fang P, et al. Error analysis of continuous GPS position time series. J. Geophys. Res., 2004, 109: B03412, doi: 10.1029/2003JB002741.
[5]  Williams S D P. The effect of coloured noise on the uncertainties of rates estimated from geodetic time series. J. Geodesy, 2003, 76(9-10): 483-494.
[6]  Kedall S M, Stuart A. The Advanced Theory of Statistics, vol.2, Inference and Relationship. London: Charles Griffin, 1979: 240-274.
[7]  Langbein J, Johnson H. Correlated errors in geodetic time series: Implications for time-dependent deformation. J. Geophys. Res., 1997, 102(B1): 591-603.
[8]  Zhang J, Bock Y, Johnson H, et al. Southern California permanent GPS geodetic array: Error analysis of daily position estimates and site velocities. J. Geophys. Res., 1997, 102(B8): 18035-18055.
[9]  Calais E. Continuous GPS measurements across the western Alps, 1994-1998. Geophys. J. Int., 1999, 138(1): 221-230,.
[10]  Bock Y, Nikolaidis R M, de Jongp P J, et al. Instantaneous geodetic positioning at medium distances with the Golbal Positioning System. J. Geophys. Res., 2000, 105(B12): 28223-28253.
[11]  Press W H, Teukolsky S A, Vetterling W T, et al. Numerical Recipes in C (2nd ed). New York: Cambridge University Press, 1992: 818.
[12]  Williams S D P. Create and Analyse Time Series: CATS software V3.1.1. GPS Solutions, 2005.
[13]  Wdowinski S, Bock Y, Zhang J, et al. Southern California permanent GPS geodetic array: Spatial filtering of daily positions for estimating coseismic and postseismic displacements induced by the 1992 Landers earthquake. J. Geophys. Res., 1997, 102(B8): 18057-18070.
[14]  Bock Y, Wdowinski S, Fang P, et al. Southern California permanent GPS geodetic array: Continuous measurements of crustal deformation between the 1992 Landers and 1994 Northridge earthquakes. J. Geophys. Res., 1997, 108(B8): 18013-18033.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133