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首页> 外文期刊>International journal of remote sensing >Detecting changes in surface soil moisture content using differential SAR interferometry
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Detecting changes in surface soil moisture content using differential SAR interferometry

机译：使用差分SAR干涉法检测地表土壤水分含量的变化

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摘要

The feasibility of measuring changes in surface soil moisture content with differential interferometric synthetic aperture radar (DInSAR) has received little attention in comparison with other active microwave techniques. In this study, multi-polarization C-and L-band DInSAR is explored as a potential tool for the measurement of changes in surface soil moisture in agricultural areas. Using 10 ascending phased array L-band SAR (PALSAR) scenes acquired by the Japanese Advanced Land Observing Satellite (ALOS) and 12 descending advanced SAR (ASAR) scenes acquired by the European ENVISAT satellite between July 2007 and November 2009, a series of 27 differential interferograms covering a common study area over southern Ireland were generated to investigate whether small-scale changes in phase are linked to measured soil moisture changes. Comparisons of observed mean surface displacement and in situ mean soil moisture change show that C-band cross-polarization pairs displayed the highest correlation coefficients over both the barley (correlation coefficient, r = 0.51, p = 0.04)- and potato crop (r = 0.8l,p = 0.003)-covered fields. Current results support the hypothesis that a soil moisture phase contribution exists within differential interferograms covering agricultural areas.
机译：与其他有源微波技术相比，使用差分干涉合成孔径雷达（DInSAR）测量地表土壤水分含量变化的可行性几乎没有受到关注。在这项研究中，探索了多极化C波段和L波段DInSAR作为测量农业地区表层土壤水分变化的潜在工具。在2007年7月至2009年11月期间，使用了日本高级陆地观测卫星（ALOS）捕获的10个升序相控阵L波段SAR（PALSAR）场景和欧洲ENVISAT卫星捕获的12个降序的先进SAR（ASAR）场景，共有27个序列产生了覆盖整个爱尔兰南部一个普通研究区域的微分干涉图，以调查相位的小尺度变化是否与测得的土壤湿度变化有关。比较观察到的平均表面位移和土壤平均原位湿度变化，结果表明，C波段交叉极化对在大麦（相关系数，r = 0.51，p = 0.04）和马铃薯作物（r = 0.8l，p = 0.003）覆盖的字段。目前的结果支持这样的假设：在覆盖农业区域的差分干涉图中存在土壤水分相的贡献。

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  • 来源
    《International journal of remote sensing》 |2013年第20期|7091-7112|共22页
  • 作者

    B. Barrett; P. Whelan; E. Dwyer;

  • 作者单位

    School of Biological, Earth and Environmental Sciences, University College Cork (UCC), Cork, Ireland;

    School of Biological, Earth and Environmental Sciences, University College Cork (UCC), Cork, Ireland;

    Coastal & Marine Resources Centre (CMRC), University College Cork (UCC), Cork, Ireland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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