Algorithm development to detect moisture, thaw/freeze condition by using radar.

开发算法以使用雷达检测湿度、解冻/冷冻状况。

• 批准号: 22404001
• 负责人: WATANABE Manabu
• 金额: $ 4.49万
• 依托单位: Japan Aerospace Exploration Agency (2011-2012)Tohoku University (2010)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22404001/
• 关键词: 土壌水分; 永久凍土; SAR; フルポーラリメトリ

The purpose of this study is to clarify the following issues.1) Understanding the radar reflection mechanism from permafrost with different moisture condition, and with thaw/freeze condition.2) Develop an algorithm for estimating moisture and detect thaw/freeze condition in the permafrost area.3) Produce the thaw/freeze map in Siberia and discuss the effect for the local life.To address issues 1), two layer model was suggested for a permafrost area, and it is shown that the model well explains the PALSAR/full polarimetry data (Paper (3)). Thaw/freeze condition was classified by the backscattering coefficient (Paper (7)). To address issues 2), an algorithm to estimate the soil moisture was suggested (Paper (7)), based on the results in 1). To address issue 3), freeze/thaw map was produced around the Lena River in Russia from PALSAR full polarimetry mode. The map indicates that one of the possible reasons for inducing the large ice jam in Markha in 2007 was rapid ground thawing.

本研究的主要目的是：1）了解不同湿度条件下的冻土雷达反射机制，以及融冻条件下的冻土雷达反射机制; 2）开发一种估算冻土区湿度和检测融冻条件的算法; 3）制作西伯利亚地区的融冻地图，并讨论其对当地生活的影响。本文提出了一个适用于多年冻土区的两层模型，该模型较好地解释了PALSAR/全极化数据（论文（3））。通过后向散射系数对解冻/冷冻条件进行分类（论文（7））。为了解决问题2），基于1）中的结果，提出了估计土壤水分的算法（论文（7））。为了解决问题3），利用PALSAR全极化模式制作了俄罗斯Lena河周围的冻融图。地图显示，导致2007年马尔卡大冰塞的可能原因之一是地面快速融化。

项目成果

Moisture & roughness estimation algorithm over permafrost area

水分

• 发表时间: 2011
• 作者: Manabu Watanabe;Keiji Kushida;Koichiro Harada;Masami Fukuda;Motoyuki Sato
• 通讯作者: Motoyuki Sato

Observation of active layer in permafrost using the PALSARJfull polari metry mode

使用 PALSARJ 全偏振测量模式观测永久冻土中的活动层

• 发表时间: 2010
• 作者: Manabu Watana;Motoyuki Sato;Koichi Iribe;Masami Fukuda;Masanobu Shimada;Takeo Tadono;Gaku Kadosaki;Kazuki Nak amura;Kazuo Ouchi
• 通讯作者: Kazuo Ouchi

PALSAR full-polar imetric observation for peatland

泥炭地 PALSAR 全极等距观测

• 发表时间: 2011
• 期刊: Asian Journal of Geoinformatics
• 作者: Takaaki Kato;Pham Thi Xuan Dung;Hoang Hai. Yon-Hai Xue;Tran Van Quang;M. Watanabe K. Kushida C. Yonezawa M. Sato M. Fukuda
• 通讯作者: M. Watanabe K. Kushida C. Yonezawa M. Sato M. Fukuda

奥の山古墳地中レーダー探査実験について

关于奥野山古坟探地雷达探测实验

• 发表时间: 2010
• 期刊: 埼玉県立史跡の博物館紀 4
• 作者: 佐藤源之;渡辺学;井上尚明
• 通讯作者: 井上尚明

Analysis of the sources of variation in L-band backscatter from terrains with permafrost

多年冻土地形L波段后向散射的变化来源分析

• 发表时间: 2012
• 期刊: IEEE Trans. Geosci. Remote Sensing
• 作者: Sudarsanam;Tulasi Ram;M. Yamamoto;B. Veenadhari and Sandeep Kumar;Manabu Watanabe Gaku Kadosaki Yongwon Kim Mamoru Ishikawa Keiji Kushida Yuki Sawada Takeo Tadono Masami Fukudah and Motoyuki Sato
• 通讯作者: Manabu Watanabe Gaku Kadosaki Yongwon Kim Mamoru Ishikawa Keiji Kushida Yuki Sawada Takeo Tadono Masami Fukudah and Motoyuki Sato