Application of the equivalence theorem to simulate GOSAT observation data under cirrus-present condition

Sergey Oshchepkov; Andrey Bril; Tatsuya Yokota; Gen Inoue

doi:10.1117/12.693537

22 December 2006 Application of the equivalence theorem to simulate GOSAT observation data under cirrus-present condition

Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, Gen Inoue

Author Affiliations +

Proceedings Volume 6405, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications; 640509 (2006) https://doi.org/10.1117/12.693537
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

We describe an original methodology to account for aerosol and cirrus cloud contributions to reflected sunlight. This method can be applied to the problem of retrieving greenhouse gases from satellite-observed data and is based on the equivalence theorem with further parameterization of the photon path-length probability density function (PPDF). Monte Carlo simulation was used to validate this parameterization for a vertically non-homogeneous atmosphere including an aerosol layer and cirrus clouds. Initial approximation suggests that the PPDF depends on four parameters that can be interpreted as the effective cloud height, cloud relative reflectance, and two additional factors to account for photon path-length distribution under the cloud. We demonstrate that these parameters can be efficiently retrieved from the nadir radiance measured in the oxygen A-band and from the H₂O-saturated area of the CO₂ 2.0 ?m spectral band.

Citation Download Citation

Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, and Gen Inoue "Application of the equivalence theorem to simulate GOSAT observation data under cirrus-present condition", Proc. SPIE 6405, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications, 640509 (22 December 2006); https://doi.org/10.1117/12.693537

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