@article{oai:jaxa.repo.nii.ac.jp:00022441, author = {島田, 政信 and 渡邉, 学 and 河野, 宣之 and 大木, 真人 and 外岡, 学志 and 和田, 裕 and Shimada, Masanobu and Watanabe, Manabu and Kawano, Noriyuki and Ohki, Masato and Motooka, Takeshi and Wada, Yutaka}, issue = {ists29}, journal = {Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan}, month = {Apr}, note = {In this paper, we evaluate the polarimetric sensitivity of multi-frequency synthetic aperture radars (SARs) fordetecting landslide areas in forest-covered mountains. We tested L-band airborne and X-band spaceborne SARs, i.e. the airborne Polarimetric Interferometric SAR in L-band (Pi-SAR-L2), Terra SAR X, and Cosmo Skymed, at theTotsukawa-mura test site in Nara, Japan. We found that three parameters-the coherence of HH and VV, polarimetric entropy, and the power ratio of HH/HV-are very effective, especially with L-band SAR, for detecting land cover changes from a forest to a landslide. Results show that X-band SARs are less sensitive to landslide areas because the X-band penetrates less through a forest compared to the L-band., 資料番号: PA1410082000}, pages = {Pn_9--Pn_15}, title = {Detecting Mountainous Landslides by SAR Polarimetry: A Comparative Study Using Pi-SAR-L2 and X-band SARs}, volume = {12}, year = {2014} }