The use of SAR satellite imagery to measure active layer moisture contents in Arctic Alaska
The use of SAR satellite imagery to measure active layer moisture contents in Arctic Alaska
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利用SAR卫星图像测量阿拉斯加北极地区活动层水分含量
DOI：
10.2166/nh.1996.0017
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发表时间：
1996
影响因子：
2.7
通讯作者：
D. Goering
中科院分区：
文献类型：
--
作者：
D. Kane;L. Hinzman;Haofang Yu;D. Goering
合成孔径雷达具有测量大面积近地表土壤含水量的潜力。欧洲航天局（欧空局）的极轨道欧洲遥感卫星（ERS-1）上载有一个有源C波段合成孔径雷达传感器。我们已经分析了SAR图像的一个小的研究流域，Imnavait溪，位于北方山麓的布鲁克斯范围在美国阿拉斯加州，这个流域是无树的，完全与永久冻土。在对图像中的每个像素（25 m × 25 m）进行几何和辐射校正后，将校正后的像素值与卫星两次通过流域中沿着断面测得的相应田间含水量进行相关性分析。校正像素值与实测含水量之间的决定系数r 2在1993年6月12日为0.49，在1993年8月2日为0.53;数据集合并后的值为0.50。
Synthetic aperture radar (SAR) has the potential for measuring near surface soil moisture contents for very large areas. The polar orbiting European Remote Sensing satellite (ERS-1) of the European Space Agency (ESA) has onboard an active C-band SAR sensor. We have analyzed SAR imagery over a small research watershed, Imnavait Creek, located in the northern foothills of the Brooks Range in Alaska, U.S.A. This watershed is treeless and completely underlain with permafrost. After geometrically and radiometrically correcting each pixel (25 m by 25 m) in the image, corrected pixel values were correlated with corresponding field moisture contents measured along transects in the watershed for two passes of the satellite. Coefficients of determination, r 2 , between the corrected pixel value and measured moisture content were 0.49 on June 12, 1993 and 0.53 on August 2, 1993; with the data sets combined the value was 0.50.