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首页> 外文期刊>Acta Oceanologica Sinica >Atmospheric correction of SeaWiFS imagery for turbid coastal and inland waters
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Atmospheric correction of SeaWiFS imagery for turbid coastal and inland waters

机译：SeaWiFS影像对沿海和内陆浑浊水域的大气校正

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摘要

A practical algorithm of atmospheric correction for turbid coastal and inland waters is provided. The present algorithm uses the property that the water-leaving radiance at 412 nm increases very little with the increasing of water turbidity. Thus, in very turbid coastal and inland waters, the radiance at 412 nm can be used to estimate the aerosol scattering radiance at 865 nm. The performance of the new algorithm is validated with simulation for several cases. It is found that the retrieved remotely sensed reflectance is usually with error less than 10% for the first six bands of SeaWiFS. This new algorithm is also tested under various atmospheric conditions in the Changjiang River Estuary and the Hangzhou Bay where the sediment concentration is very high and the standard SeaWiFS atmospheric correction algorithm creates a mask due to atmospheric correction failure. The result proves the efficiency of this simple algorithm in reducing the errors of the water-leaving radiance retrieving using SeaWiFS satellite data.
机译：提供了一种实用的大气校正近岸和内陆水域大气校正算法。本算法利用以下特性：随着水浊度的增加，在412 nm处的出水辐射率几乎没有增加。因此，在非常浑浊的沿海和内陆水域中，可以使用412 nm处的辐射来估计865 nm处的气溶胶散射辐射。在几种情况下，通过仿真验证了新算法的性能。已经发现，对于SeaWiFS的前六个波段，检索到的遥感反射率通常误差小于10％。此新算法还在长江口和杭州湾的各种大气条件下进行了测试，这些地区的沉积物浓度非常高，标准的SeaWiFS大气校正算法会因大气校正失败而产生遮罩。结果证明了该简单算法在减少使用SeaWiFS卫星数据进行的取水辐射率误差方面的效率。

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