碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 105 / In this paper, we used the spaceborne Synthetic Aperture Radar (SAR) images in monitoring floating sargassum and interpreting the features of sargassum. Pelagic sargassum is a threat to shipping. When the boats cross a mass of sargassum seaweed, the boats' engine might be broken by sargassum. However, the sargassum also provide marine habitat for some marine life. Therefore, tracking and observing of incoming seaweed is an important issue in marine ecology. Synthetic Aperture Radar (SAR) relies on microwave radiation, and is not affected by the weather and night, so we used the Sentinel-1A and MODIS Alternate Floating Algae Index(AFAI) images. Combining SAR and optical images to find relevance and verify the correctness of the results. Thus, the 5 acquisitions of Sentinel-1A were used in this study. The results showed that two of Sentinel-1A images’ features can correspond to AFAI images, another one Sentinel-1A image has obvious floating features on the sea, and the other two Sentinel-1A images were collected in November. According to the reference, the November was not the growing season of sargassum, hence we didn’t find any features of sargassum either Sentinel-1A images or AFAI images in November. Therefore, we do the feasibility study of monitoring floating sargassum by spaceborne SAR images based on these results.
| Identifer | oai:union.ndltd.org:TW/105NTOU5276009 |
| Date | January 2017 |
| Creators | Hsu, Wei-Ling, 許偉玲 |
| Contributors | Kuo, Nan-Jung, 郭南榮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 49 |
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