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首页> 外文会议>Remote Sensing of Clouds and the Atmosphere XII; Proceedings of SPIE-The International Society for Optical Engineering; vol.6745 >Retrieval of atmospheric water content based on AISA+ data
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Retrieval of atmospheric water content based on AISA+ data

机译：根据AISA +数据检索大气含水量

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摘要

Many applications require the elimination of atmospheric effects caused by molecular, particulate scattering and atmospheric water content factors, a process known as atmospheric correction, compensation, or removal. Retrieval of atmospheric water content from remote sensing data is very important for atmospheric correction. This paper introduces and derives the algorithm about retrieving water content of atmosphere from AISA+ (Airborne Imaging Spectrometer for Application) data based on Modtran code. AISA+ sensor is put on the aviation platform covering the East Sea in China on July 29, 2005. AISA+ is Hyperspectral Imaging sensor including 61 bands from visible to NIR, and band 56 and band 59 are in water absorbed region and band 51 is in atmospheric window. So the three bands were used to in following expressions. The authors utilized 2 near-IR "water vapor" channels in addition to existing "windows" channels, it will be possible to derive the water vapor amount from AISA+ data in Eastern Sea in China and analyze the retrieving result. Finally, the relationships between the transmittance and atmospheric water content of AISA+ data was computed and analyzed. The maximum atmospheric water content retrieved from AISA+ image is 1.43 cm and the minimum water content is 0.04 cm, and average atmospheric water content is 0.40 cm. The results are consistent with the real conditions, so the methods are feasible for retrieval of atmospheric water contents from AISA+ data.
机译：许多应用要求消除由分子，颗粒物散射和大气水分含量因素引起的大气影响，这一过程称为大气校正，补偿或去除。从遥感数据中获取大气水分对于大气校正非常重要。本文介绍并推导了基于Modtran代码的AISA +（机载成像光谱仪）数据检索大气水分的算法。 AISA +传感器于2005年7月29日投放在覆盖中国东海的航空平台上。AISA+是高光谱成像传感器，包括从可见到近红外的61个波段，其中56和59波段处于水吸收区域，而51波段处于大气窗口。因此，这三个波段习惯于以下表达式。作者除了利用现有的“窗口”信道外还利用了2个近红外“水蒸气”信道，将有可能从中国东海的AISA +数据中得出水蒸气量并分析其检索结果。最后，计算并分析了AISA +数据的透射率与大气含水量之间的关系。从AISA +图像中检索到的最大大气水含量为1.43 cm，最小水含量为0.04 cm，平均大气水含量为0.40 cm。结果与实际情况吻合，因此该方法可用于从AISA +数据中检索大气含水量。

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