Stratocumulus parameter retrieval using MODIS nighttime imagery: a theoretical approach

Juan C. Perez; Albano Gonzalez; Fernando Rosa; Felix Herrera; Dulce M. de la Cruz

doi:10.1117/12.413849

31 January 2001 Stratocumulus parameter retrieval using MODIS nighttime imagery: a theoretical approach

Juan C. Perez, Albano Gonzalez, Fernando Rosa, Felix Herrera, Dulce M. de la Cruz

Proceedings Volume 4168, Remote Sensing of Clouds and the Atmosphere V; (2001) https://doi.org/10.1117/12.413849
Event: Europto Remote Sensing, 2000, Barcelona, Spain

Abstract

This work is a preliminary study of the viability of retrieving macro physical and micro physical cloud parameters from nighttime radiances provided by MODIS sensor, onboard Terra spacecraft. It is based on the analysis of the sensitivity of every MODIS IR band to each of the parameters that describe the different layers composing the earth-cloud-atmosphere system. IN order to make this analysis, an atmospheric radiative transfer model that makes use of the discrete ordinates method DISORT is employed. Multiple simulations are performed for a great variety of clouds and atmospheric conditions, taking into account the main absorbers in each band. As a first result, the more adequate bands for our purpose are select and, using these channels, the proposed method extracts the parameters characterizing the different layers through a numerical inversion of the radiative model based on an evolutionary method for solving optimization problems called scatter search. In addition, a sensitivity analysis is carried out in order to estimate the impact on the retrieved values of the uncertainties in model inputs and assumptions.

Citation Download Citation

Juan C. Perez, Albano Gonzalez, Fernando Rosa, Felix Herrera, and Dulce M. de la Cruz "Stratocumulus parameter retrieval using MODIS nighttime imagery: a theoretical approach", Proc. SPIE 4168, Remote Sensing of Clouds and the Atmosphere V, (31 January 2001); https://doi.org/10.1117/12.413849

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