文献类型：期刊文献

中文题名：南海海域VIIRS瑞利校正反射率的耀斑校正方法

英文题名：Sun Glint Correction of VIIRS Rayleigh Corrected Reflectance in the South China Sea

作者：王炎[1,2];付东洋[1,2];陶邦一[3];刘贝[1,2];栾恬婧[3]

机构：[1]广东海洋大学电子与信息工程学院,广东湛江524088;[2]广东省海洋遥感与信息技术工程技术中心,广东湛江524088;[3]自然资源部第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012

年份：2025

卷号：45

期号：5

起止页码：34

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：北大核心2023、、北大核心

基金：国家重点研发计划(2022YFC3103101);南方海洋科学与工程广东省实验室(广州)重大专项团队项目(GML2021GD0809);广东省教育厅重点科研项目(2023ZDZX4009)。

语种：中文

中文关键词：南海;太阳耀斑;VIIRS;瑞利校正反射率

外文关键词：South China Sea;sun glint;VIIRS;Rayleigh-corrected reflectance

中文摘要：【目的】针对海洋水色卫星遥感中太阳耀斑干扰导致的水色信息缺失问题,建立适用于南海海域的耀斑校正系数确定方法,以提升耀斑区水色信息提取的准确性与稳定性。【方法】选取VIIRS影像易受太阳耀斑影响的南海海域,从SS486、CI551和SS671三个基线指数出发,基于临近日期同一区域有耀斑和无耀斑影像数据匹配集,采用基线指数直方图余弦相似度最大化的方法,确定各波段的耀斑校正系数最优值以及均值,分析耀斑校正前后基线指数提取结果。【结果与结论】最优值法和均值法耀斑校正效果良好。均值耀斑校正系数α(443)、α(486)、α(551)、α(671)和α(745)分别为0.75、0.83、0.89、0.95和0.94,可以作为南海海域的VIIRS影像瑞利校正反射率(Rayleigh-corrected reflectance, Rrc)的耀斑校正系数;最优值法校正效果更佳,但其应用需依赖于邻近日期未受耀斑影响的影像匹配,受到较多限制条件的约束;均值校正方法应用更为便捷,适用性更广泛。

外文摘要：【Objective】To mitigate the impact of sun glint interference that leads to water color information loss in ocean color satellite remote sensing,this study aims to establish the method for determining sun glint correction coefficients tailored to the South China Sea,in order to enhance the accuracy and stability of water color retrieval in sun glint-contaminated regions.【Method】Focusing on the South China Sea,a region where VIIRS imagery is highly susceptible to sun glint contamination,and starting from the baseline indices SS486,CI551,and SS671,a temporally matched dataset of sun glint-contaminated and sun glint-free VIIRS images over the same region was constructed.By maximizing the cosine similarity between the histograms of the baseline indices,the optimal and mean sun glint correction coefficients for each spectral band were determined.The variations in baseline index extraction before and after sun glint correction were then analyzed. 【Results and Conclusion】Both the optimal-value and mean-value correction methods were effective in mitigating sun glinteffects. The mean sun glint correction coefficients α(443), α(486), α(551), α(671), and α(745) weredetermined to be 0.75, 0.83, 0.89, 0.95, and 0.94, respectively, and can be applied directly to VIIRSRayleigh-corrected reflectance (Rrc) data in the South China Sea. The optimal-value method generallyachieves higher correction accuracy, but it requires temporally matched sun glint-free referenceimagery, imposing operational limitations. In contrast, the mean-value method is easier to implementand offers broader applicability.