南海海域VIIRS瑞利校正反射率的耀斑校正方法Sun Glint Correction of VIIRS Rayleigh Corrected Reflectance in the South China Sea
王炎,付东洋,陶邦一,刘贝,栾恬婧
摘要(Abstract)：
【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, R_(rc)）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。
关键词(KeyWords)： 南海;太阳耀斑;VIIRS;瑞利校正反射率
基金项目(Foundation): 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）
作者(Author): 王炎,付东洋,陶邦一,刘贝,栾恬婧
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