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首页> 外文会议>Conference on Ocean Remote Sensing and Applications Oct 24-26, 2002 Hangzhou, China >Atmospheric correction of SeaWiFS imagery for turbid waters in Southern China coastal areas
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Atmospheric correction of SeaWiFS imagery for turbid waters in Southern China coastal areas

机译：中国南方沿海地区浑浊水域的SeaWiFS影像的大气校正

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摘要

The atmospheric-correction of satellite ocean color data is fundamental for applications of the satellite data. The atmospheric-correction of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) data is successful for open ocean waters, but fails for turbid coastal waters, when using the default algorithm of SeaWiFS Data Analyze System (SeaDAS), resulting in an over-correction of atmospheric effects. Based on the basic principle of atmospheric correction, a practical approach was developed for atmospheric correction of SeaWiFS imagery for turbid coastal waters. We took the assumption of spatial homogeneity of band7-band8 ratio of aerosol radiance and of water-leaving radiance over relatively small spatial scales (100-200 km), the two ratios were calculated from the processed results of SeaDAS standard atmospheric correction algorithm. The correction approach could reduce the errors of water-leaving radiance. In addition the water-leaving radiance in turbid water areas where the default SeaDAS algorithms added a mask for atmospheric correction failure could be retrieved. Then the results were compared with that of other atmospheric-correction method for turbid coastal waters.
机译：卫星海洋颜色数据的大气校正是应用卫星数据的基础。当使用SeaWiFS数据分析系统（SeaDAS）的默认算法时，对广域海洋水域的海洋校正宽视场传感器（SeaWiFS）数据进行的大气校正是成功的，但对于混浊的沿海水域则无法进行大气校正。过度校正大气影响。基于大气校正的基本原理，开发了一种实用的方法来对浑浊的沿海水域的SeaWiFS图像进行大气校正。我们假设在相对较小的空间尺度（100-200 km）内，气溶胶辐射度和留水辐射度的7到8比率的空间均匀性，这两个比率是根据SeaDAS标准大气校正算法的处理结果计算得出的。该校正方法可以减少出水辐射的误差。此外，可以检索默认SeaDAS算法添加了用于大气校正失败的遮罩的浑浊水域中的放水辐射率。然后将结果与其他浊度沿海水域大气校正方法的结果进行比较。

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