报告详情
The Application of MII/SDGSAT-1 in Red Tide Detection Along the Guangdong Middle Coast
编号：3184
访问权限：私有
更新：2023-04-12 21:36:43 浏览：201次
口头报告
报告开始：2023年05月06日 13:10（Asia/Shanghai）
报告时间：10min
所在会场：[5A] 5A、环境科学 [5A-1] 5A-1 环境科学
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摘要
The Sustainable Development Science Satellite 1 (SDGSAT-1) is the world’s first science satellite dedicated to serving the United Nations 2030 Agenda for Sustainable Development. The Multispectral Imagers (MII) onboard SDGSAT-1 provides an alternative data source to effectively monitor the coastal water environments. In this study, the performances of MII in red tide detection were evaluated along the Guangdong middle coast. First, the in-orbit signal-to-noise ratios (SNRs) were estimated based on homogenous clear water pixels. The SNRs of the blue and green bands were in the range of 270-410 while those of the red and near-infrared red bands were in the range of 100-160. Then, the nearest non-turbid atmospheric correction was applied to MII data and two types of red tide indexes were compared. The results showed that the hue angle red tide index (HA-RI) better distinguished red tide and turbid water pixels. The Rayleigh-corrected reflectance can also be used to derive HA-RI as well as remote sensing reflectance when decent atmospheric correction is not available. Two red tides that occurred in Daya Bay and Mirs Bay were detected by HA-RI with areas of 13.1 km2 and 5.7 km2, respectively. More detailed spatial characteristics of red tide were observed by MII due to the higher spatial resolution of 10 m. In addition, multi-source data are required to compensate for the weakness of SDGSAT-1 in temporal resolution for red tide tracing. The design of a three-satellite constellation will further enhance the monitoring capacities of SDGSAT series and strengthen sustainable development.
关键词
SDGSAT,red tide,ocean color,algae bloom
报告人
吴颉
国防科技大学稿件作者
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重要日期
-
会议日期
05月05日
2023
至05月08日
2023
-
03月31日 2023
初稿截稿日期
-
05月25日 2023
注册截止日期
主办单位
青年地学论坛理事会
中国科学院青年创新促进会地学分会
中国科学院青年创新促进会地学分会
承办单位
武汉大学
中国科学院精密测量科学与技术创新研究院
中国地质大学（武汉）
中国科学院精密测量科学与技术创新研究院
中国地质大学（武汉）
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