TRACK高频GPS定位中震时参考站的选取方法
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摘要
对于以TRACK软件为代表的差分定位软件来说,震时参考站的选择是高频GPS数据处理中的关键问题。以汶川地震为例,通过对比分析,认为选择观测质量较高,多路径效应小于0.2 m,且间距大于地震波传播速率与持续时间乘积的站点作为参考站,可获得高精度的定位结果。并通过与两种非差软件GIPSY和PANDA的对比,验证了方法的可靠性。
The reference station selecting during the earthquake is very important for the differential positioning software like TRACK in GAMIT/GLOBK.Some comparisons and analysis about Wenchuan earthquake are done,then we conclude that the for reference station select is most important.In the selection,the observations should be of high quality,the multipath effect should be less than 0.2 m and the distance between rover station and reference station should be more than the product of the velocity of seismic wave propagation multiple by the lasing time.Compared with two un-differenced software GIPSY and PANDA,the results with this method are reliable.
The reference station selecting during the earthquake is very important for the differential positioning software like TRACK in GAMIT/GLOBK.Some comparisons and analysis about Wenchuan earthquake are done,then we conclude that the for reference station select is most important.In the selection,the observations should be of high quality,the multipath effect should be less than 0.2 m and the distance between rover station and reference station should be more than the product of the velocity of seismic wave propagation multiple by the lasing time.Compared with two un-differenced software GIPSY and PANDA,the results with this method are reliable.
引文
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21殷海涛,等.PCA空间滤波在高频GPS定位中的应用研究[J].武汉大学学报(信息科学版),2011,36(7):825-829.(Yin Haitao,et al.Study on the effect of PCA spatial filtering on high-rate GPS positioning[J].Geomat-ics and Information Science of Wuhan University,2011,36(7):825-829)
22祝芙英,等.震前电离层TEC异常探测方法研究[J].大地测量与地球动力学,2009,(3):50-54.(Zhu Fuying,et al.Study on method of detecting ionospheric TEC anom-aly before earthquake[J].Journal of Geodesy and Geody-namics,2009,(3):50-54)
2 Gan Weijun,et al.Present-day crustal motion within the Tibetan plateau inferred from GPS measurements[J].Jour-nal of Geophysical Research,2007,112,B08416,doi:10.1029/2005JB004120.
3殷海涛,等.汶川地震前后对山东地区地壳变化特征的初步分析[J].大地测量与地球动力学,2009,(3):23-27.(Yin Haitao,et al.Research on characteristics of crustal movement of Shandong and Surrounding areas before and af-ter Wenchuan Ms8.0 earthquake[J].Journal of Geodesy and Geodynamics,2009,(3):23-27)
4金双根,朱文耀.太平洋板块运动和形变及其边缘现今相对运动[J].大地测量与地球动力学,2002,(2):57-60.(Jin Shuangyin and Zhu Wenyao.The motion and de-formation of Pracific plate and contemporary relative motion at its boundaries[J].Journal of Geodesy and Geodynamics,2002,(2):57-60)
5殷海涛等.山东及周边地块间近期运动状态分析[J].大地测量与地球动力学,2011,(4):37-40.(Yin Haitao,et al.Analysis of present movement state of Shandong and sur-rounding blocks[J].Journal of Geodesy and Geodynamics,2011,(4):37-40)
6 Wiens D A,et al.Simultaneous teleseismic and geodetic ob-servations of the stick-slip motion of an Antarctic ice stream[J].Nature,2008,453:770-774.
7 Kristine M,et al.Using 1-Hz GPS data to measure deforma-tions caused by the Denali fault earthquake[J].Science,2003,(300):1 421-1 424.
8 Blewitt G,et al.GPS for real-time earthquake source deter-mination and tsunami warning systems[J].J Geodes.,2009,83:335-343.
9 Cervelli P F,et al.Ground deformation associated with the precursory usrest and early phases of the January 2006 erup-tion of Augustine Volcano,Alaska[J].Geophys Res Lett.,2006,33:L18304,doi:10.1029/2006GL027219.
10 Wang G Q.GPS landslide monitoring:Single base vs.net-work solutions,a case study based on the Puerto Rico and Virgin Islands Permanent GPS Network[J].Journal of Geo-detic Science,2011,1(3):191-203,Doi:10.2478/v10156-010-0022-3.
11 Miyazaki S,et al.One Hz sampling GPS as an Ultra-long-period seismograph[R].AGU Fall Meeting,December 8-12,California,1997.
12 Nikolaidis R,et al.Seismic wave observation with the global positioning system[J].J Geophys Res.,2001,(106):21 897-21 916.
13 Ohta Y,et al.Large surface wave of the 2004 Sumatra-An-daman earthquake captured by the very long baseline kine-matic analysis of 1-Hz GPS data[J].Earth Planets Space,2006,58:153-157.
14 Grapenthin R and Freymueller J T.The dynamics of a seis-mic wave field:Animation and analysis of kinematic GPS data recorded during the 2011 Tohoku-oki earthquake[J].Geophys Res Lett.,2011,(38):L18308,doi:10.1029/2011GL048405.
15殷海涛,等.高频GPS测定的汶川Ms8.0地震震时近场地表变形过程[J].科学通报,2010,55(26):2 621-2626.(Yin Haitao,et al.Near-field surface movement during the Wenchuan Ms8.0 earthquake measured by high-rate GPS[J].Chinese Sci Bull.,2010,55,doi:10.1007/s11434-010-4026-2)
16 Shi C,et al.Seismic deformation of the Mw8.0 Wenchuan earthquake from high-rate GPS observations[J].Advances in Space Research,2010,46:228-235.
17黄立人,易长荣,占惠.GPS观测得到的汶川地震远场地面运动[J].工程地球物理学报,2008,5(6):657-663.(Huang Liren,Yi Changrong and Zhan Hui.Far-field ground motion of the Wenchuan earthquake observed by GPS[J].Chinese Journal of Engineering Geophysics,2008,5(6):657-663)
18 Wubbena G.Software developments for geodetic positioning with GPS using TI-4100 code and carrier measurements[A].Proceedings of the First International Symposium on Precise Positioning with the Global Positioning Sysetm[C].Maryland,1985,15-19.
19 Melbourne G.The case for ranging in GPS based geodetic systems[A].Proceedings of the First International Sympo-sium on Precise Positioning with the Global Positioning Sy-setm[C].Maryland,1985,373-386.
20殷海涛,等.恒星日滤波的修正及对高频GPS定位的影响研究[J].武汉大学学报(信息科学版),2011,36(5):609-611.(Yin Haitao,et al.Modified sidereal filter and its effect on high rate GPS positioning[J].Geomatics and Information Science of Wuhan University,2011,36(5):609-611)
21殷海涛,等.PCA空间滤波在高频GPS定位中的应用研究[J].武汉大学学报(信息科学版),2011,36(7):825-829.(Yin Haitao,et al.Study on the effect of PCA spatial filtering on high-rate GPS positioning[J].Geomat-ics and Information Science of Wuhan University,2011,36(7):825-829)
22祝芙英,等.震前电离层TEC异常探测方法研究[J].大地测量与地球动力学,2009,(3):50-54.(Zhu Fuying,et al.Study on method of detecting ionospheric TEC anom-aly before earthquake[J].Journal of Geodesy and Geody-namics,2009,(3):50-54)
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