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...

改进的Kriging算法用于GPS水汽插值研究

DOI: 10.6046/gtzyyg.2013.01.07, PP. 39-43

Keywords: Kriging,InSAR,大气延迟,插值,GPS

Full-Text   Cite this paper   Add to My Lib

Abstract:

大气水汽含量在时间和空间上波动所造成的雷达信号不确定性延迟,是影响雷达干涉测量精度的主要因素之一。将高精度地基GPS可降水汽值用于SAR影像大气延迟的改正,需要采用合适的插值方法对GPS观测值进行空间插值。常规的逆距离权(inversedistanceweighted,IDW)倒数和克里格(Kriging)等空间插值方法,由于未考虑地形对大气延迟的影响,其应用效果不理想。为此,提出了一种改进的Kriging插值方法,该方法充分考虑了高程和距离对大气插值的影响。对香港地区GPS水汽观测建立的区域水汽改正模型实验结果表明,改进的Kriging方法具有明显的优越性,可以进一步推广用于建立多影响因素的拟合插值模型。

References

[1]  Massonnet D,Feigl K L.Radar interferometry and its application to changes in the earth's surface[J].Reviews of Geophysics,1998,36(4):441-500.
[2]  Goldstein R M,Engelhardt H,Kamb B,et al.Satellite radar interferometry for monitoring ice sheet motion:Application to an antarctic ice stream[J].Science,1993,262(5139):1525-1530.
[3]  张勤,赵超英,丁晓利,等.利用InSAR与GPS研究西安现今地面沉降与地裂缝时空演化特征[J].地球物理学报,2009,52(5):1214-1222. Zhang Q,Zhao C Y,Ding X L,et al.Research on recent characteristics of spatio-temporal evolution and mechanism of Xi'an land subsidence and ground fissure by using GPS and InSAR techniques[J].Chinese Journal of Geophysics,2009,52(5):1214-1222.
[4]  Zhao C Y,Zhang Q,Ding X L,et al.Monitoring of land subsidence and ground fissures in Xi'an,China 2005-2006:Mapped by SAR interferometry[J].Environmental Geology,2009,58(7):1533-1540.
[5]  Zebker H,Rosen P,Hensley S.Atmospheric effects in interferometric synthetic aperture radar surface deformation and topographic maps[J].J Geophys Res,1997,2(B4):7547-7563.
[6]  Goldstein R.Atmospheric limitations to repeat-track radar interferometry[J].Geophysical Research Letters,1995,22(18):2517-2520.
[7]  Hanssen R F,Weckwerth T M,Zebker H A,et al.High-resolution water vapor mapping from interferometric radar measurements[J].Science,1999,283(5406):1297-1299.
[8]  Li Z H.Correction of atmospheric water vapour effects on repeatopass SAR interferometry using GPS,MODIS and MERIS data[D].London:University College London,2005.
[9]  张双成.地基GPS遥感水汽空间分布技术与应用[D].武汉:武汉大学,2009. Zhang S C.Research and application of remote sensing water vapor using ground_based GPS/Met[D].Wuhan:Wuhan University,2009.
[10]  Gendt G,Dick G,Reigber C,et al.Demonstration of NRT GPS water vapor monitoring for numerical weather prediction in germany[J].Journal of the Meteorological Society of Japan,2004,82(1B):361-370.
[11]  Janssen V,Ge L L,Rizos C.Tropospheric corrections to SAR interferometry from GPS observations[EB/OL].
[12]  Matheron G.Principles of geostatistics[J].Economic Geology,1963,58(8):1246-1266.
[13]  王正权.地统计学及在生态学中的应用[M].北京:科学出版社,1999. Wang Z Q.Geostatistics and its application in ecology[M].Beijing:Science Press,1999.
[14]  Song X G,Li D R,Liao M S.Reproduction of InSAR atmospheric signal using GPS data based on topography-dependent and turbulent mixing model[C]//Proceedings of the Dragon Programme Final Results,2008.
[15]  Paola Ballatore.Synthetic aperture radar interferometry:Separation of atmospheric artifacts from effects due to the topography and the terrain displacements[J].Earth Planets Space,2006,58:927-935.
[16]  Fayaz O.Modeling water vapor using GPS with application to mitigating InSAR atmospheric distortions[D].Stanford:Stanford University,2006.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133