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http://dx.doi.org/10.5515/KJKIEES.2013.24.4.459

Remote Sensing of Soil Moisture Change Using a Differential Interferometry Technique  

Park, Sin-Myeong (Department of Electronic Information and Communication Engineering, Hongik University)
Oh, Yisok (Department of Electronic Information and Communication Engineering, Hongik University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.24, no.4, 2013 , pp. 459-465 More about this Journal
Abstract
This paper presents a differential interferometry technique for soil moisture change detection by measuring surface-height variation. COSMO-SkyMed SAR images were used to verify the DInSAR(differential interferometric SAR) technique. The soil penetration depth changes according to soil moisture, that causes phase change of the received signal. The height of soil surface and its displacement can be detected by a radar interferometry technique using phase difference of two received signals. To retrieve displacement variation, one of three SAR images is used as a reference image. Reference image and other two images are processed by the differential interferometry technique in the same area. The soil moisture was measured for the test sites to verify the DInSAR technique. The penetration depth is calculated by using the in-situ measured soil moisture data and it is compared with the displacement values acquired by the DInSAR technique.
Keywords
Soil Moisture; Interferometry SAR; Penetration Depth; DInSAR;
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