Retrieval of atmospheric water content based on AISA+ data

Qian Cheng; Delu Pan; Difeng Wang; Jianyu Chen; Tianming Mao

doi:10.1117/12.731216

25 October 2007 Retrieval of atmospheric water content based on AISA+ data

Qian Cheng, Delu Pan, Difeng Wang, Jianyu Chen, Tianming Mao

Proceedings Volume 6745, Remote Sensing of Clouds and the Atmosphere XII; 67450C (2007) https://doi.org/10.1117/12.731216
Event: SPIE Remote Sensing, 2007, Florence, Italy

Abstract

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.

Citation Download Citation

Qian Cheng, Delu Pan, Difeng Wang, Jianyu Chen, and Tianming Mao "Retrieval of atmospheric water content based on AISA+ data", Proc. SPIE 6745, Remote Sensing of Clouds and the Atmosphere XII, 67450C (25 October 2007); https://doi.org/10.1117/12.731216

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