Estimation of Coastal Lagoon Surface Wind Speed Distribution Using Satellite SAR Data
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- ICHIKAWA Keisuke
- JATCO, Ltd.
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- KOZU Toshiaki
- Interdisciplinary faculty of science and engineering, Shimane University
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- SHIMOMAI Toyoshi
- Interdisciplinary faculty of science and engineering, Shimane University
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- SAKUNO Yuji
- Graduate school of engineering, Hiroshima University
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- MATSUNAGA Tsuneo
- National Institute for Environmental Studies
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- TAKAYASU Katsumi
- Shimane University
Bibliographic Information
- Other Title
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- 衛星搭載合成開口レーダによる汽水域の湖上風速分布推定
- エイセイ トウサイ ゴウセイ カイコウ レーダ ニ ヨル キスイイキ ノ コジョウ フウソク ブンプ スイテイ
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Abstract
An extensive study result is presented on the feasibility of SAR estimation of surface wind-speed distribution for coastal lagoon, specifically Lakes Shinji and Nakaumi, Japan. Four satellite-borne SARs, JERS-1, ERS-1, ERS-2 and Radarsat, are used to study the relation between SAR-derived normalized radar cross-section (NRCS) and in-situ surface winds, in order to study the dependence of SAR frequency and incidence angle on the sensitivity of NRCS change to wind speed. It is found that SAR NRCSs have good correlations with the in-situ wind data when C-band and relatively high incidence angle is used and when wind speed is moderate to high, indicating that such SARs have a potential to estimate high-spatial-resolution wind field. On the other hand, peculiar signatures are sometimes found especially when wind speed is low, indicating that the SAR is sensitive to very fine roughness conditions that may be caused by slicks, water flows and/or ship wakes. A simple spatial filtering is also tested to detect such signatures to extract the areas where SAR-estimated wind speed is reliable.
Journal
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- Journal of The Remote Sensing Society of Japan
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Journal of The Remote Sensing Society of Japan 28 (5), 411-426, 2008
The Remote Sensing Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679642308352
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- NII Article ID
- 10024485257
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- NII Book ID
- AN10035665
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- ISSN
- 18831184
- 02897911
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- NDL BIB ID
- 9743206
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed