衛星搭載合成開口レーダによる汽水域の環境観測 : 湖上風速分布推定可能性の予備検討

Coastal lagoon is more directly affected by surrounding environment than open ocean areas, so it is important to continuously monitor its environment. The Synthetic Aperture Radar(SAR) is an active microwave sensor having a high spatial resolution and all-weather monitoring capability. Thus it should be especially useful to observe narrow water areas like coastal lagoon. We have been studying the feasibility developing a satellite remote-sensing system to explore the possibility of wind of utilizing a satellite SAR (Synthetic Aperture Radar) as a part of monitor the environment of Lake Shinji and Lake Nakaumi. In this paper, we analyze JERS 1/SAR data, acquired until now for several years, as a preliminary an examination of wind speed estimation with the SAR. As a result, good correlations are obtained between in-situ wind speed and NRCS observed by the SAR in moderate to high wind conditions. We have conducted a series of coincident satellite and in-situ observation experiments at Lake Shinji and Lake Nakaumi in 2001. We also summarize these observations.