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TAKEYAMA Yuko
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Research Interests 【 display / non-display 】
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Wind assessment
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Marine Meteorology
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Offshore wind generation
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Satellite remote sensing
Research Areas 【 display / non-display 】
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Energy Engineering / Earth resource engineering, Energy sciences
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Frontier Technology (Aerospace Engineering, Marine and Maritime Engineering) / Marine engineering
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Natural Science / Atmospheric and hydrospheric sciences
Papers 【 display / non-display 】
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Coastal sea surface wind speed retrievals from X-band Synthetic Aperture Radars onboard StriX satellites
Yuko Takeyama, Souta Morioka, Fujita Aito, Orzeł Krzysztof, Ogushi Toshihiko, Praveen Kumar , 2025.12
AGU fall meeting 2025
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Improving the Accuracy of a Sea Surface Wind Estimation Algorithm Using Synthetic Aperture Radar from ASNARO-2
Naoyuki Takemoto, Yuko Takeyama , 2025.12
AGU fall meeting 2025
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Offshore wind map from C-band and Ku-band satellite scatterometers around Japan
Shingo Sato, Yuko Takeyama , 2025.12
AGU fall meeting 2025
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Offshore wind retrievals at the hub height of wind turbine from the satellite observation in coastal waters
Yuko Takeyama, Susumu Takakuwa, Seiya Hasegawa, Yuki Itoshima, Takehiko Tanamachi, Jun Yamato, Nana Jumonji , 2025.09
EMS annual meeting 2025
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外洋におけるハブ高度風況推定技術の検討（その2）―衛星の観測頻度が推定精度に与える影響―
1. 赤井玲那，大澤輝夫，長谷瑞木，見崎豪之，濱田康平，竹山優子，内山将吾 , 2024.12
風力エネルギー利用シンポジウム予稿集
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Project Period (FY)： 2025/04 - 2029/03 Investigator(s): 大澤 輝夫
Grant-in-Aid for Scientific Research(A) Co-Investigator 25H00772
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洋上風力発電のためのX-band合成開口レーダの降雨影響把握と利用可能性評価
Project Period (FY)： 2023/04 - 2028/03 Investigator(s): 竹山優子
Grant-in-Aid for Scientific Research(C) Principal Investigator 23K04249
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Project Period (FY)： 2022/04 - 2025/03 Investigator(s): 大澤 輝夫
Grant-in-Aid for Scientific Research(B) Co-Investigator 23K23286
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Improving the Reliability of Coastal Wind Statistics Using Synthetic Aperture Radar
Project Period (FY)： 2019/04 - 2023/03 Investigator(s): Takeyama Yuko
Grant-in-Aid for Scientific Research(C) Principal Investigator 19K04856
In this study, the accuracy of wind speed estimation in coastal areas of Japan using a synthetic aperture radar (SAR) onboard Sentinel-1 was clarified, and a comparison of multiple methods was conducted for identifying suitable wind direction for the wind speed retrieval.
The results show that smoothing at 500 m is effective in reducing the effects of speckle noise in SAR images, artificial structures and breaking waves that are common in coastal areas. The results also showed the effectiveness of the wind direction information from the Sentinel-1 OCN product. It means that we can retrieve wind speeds from SAR images without wind direction information from external sources. -
Establishment of a reliable and bankable method for offshore wind resource assessment
Project Period (FY)： 2017/04 - 2020/03 Investigator(s): Ohsawa Teruo
Grant-in-Aid for Scientific Research(B) Co-Investigator 17H03492
For offshore wind development, it is necessary to obtain high-quality bankable wind data, by carrying out field observation at a candidate site selected from the nationwide offshore wind resource map. This project conducts a comprehensive wind observation and numerical simulation for the coastal waters off Kamisu, Ibaraki Prefecture, using vertical and scanning Doppler LiDARs as well as meteorological observation equipment on a pier and a buoy, in order to establish a reliable and accurate method for offshore wind resource assessment.
Lesson Subject 【 display / non-display 】
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Lesson Subject（Undergraduate）
Freshman Seminar
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Ocean Renewable Energy Science
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Laboratory work of Ocean Development Studies
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Lesson Subject（Graduate School）
Marine Meteorogical Analysis
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Lesson Subject（Advanced Course）
Atmospheric Science