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Title
Japanese:小型 SAR 衛星コンステレーションによる 河川氾濫域の高頻度観測の可能性 
English:POSSIBILITY OF HIGH-FREQUENCY OBSERVATION OF INUNDATION AREA BY SMALL SAR SATELLITES CONSTELLATION 
Author
Japanese: 北島夏実, 瀬戸里枝, 山崎大, Xudong ZHOU, Wenchao MA, 鼎信次郎.  
English: Natsumi Kitajima, Rie Seto, Dai Yamazaki, Xudong ZHOU, Wenchao MA, Shinjiro Kanae.  
Language Japanese 
Journal/Book name
Japanese:土木学会論文集B1（水工学） 
English:Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 
Volume, Number, Page Vol. 76    No. 2    I535-I540
Published date Nov. 2020 
Publisher
Japanese:公益社団法人土木学会 
English:Japan Society of Civil Engineers 
Conference name
Japanese:第65回水工学講演会 
English:The 65th Conference on Hydraulic Engineering 
Conference site
Japanese:オンライン 
English:Online 
Abstract In a disaster management, a SAR satellite is an effective tool to extract inundation areas since it enables remote observation over wide areas even at night or in a cloudy situation. At present observation opportunities of SAR satellites are limited to about twice a day. However, thanks to the recent technological innovations in miniaturization of SAR satellites, high-frequency observations by small SAR constellations could be possible in the future. In this research, a constellation of small SAR satellites was designed with Walker Constellation method, and it was demonstrated that 40 satellites can accomplish 1 hourly observation. Combining this assumed condition with hourly flood plain water depth of CaMa-Flood, the cover ratio of flood area by the observation was analyzed and the constraints were indicated as a specific case．
Award 令和3年度水工学論文奨励賞

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