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Radiative transfer models for retrieval of cloud parameters from EPIC/DSCOVR measurements

Molina García, Víctor and Sasi, Sruthy and Efremenko, Dmitry and Doicu, Adrian and Loyola, Diego (2018) Radiative transfer models for retrieval of cloud parameters from EPIC/DSCOVR measurements. Journal of Quantitative Spectroscopy & Radiative Transfer, 213, pp. 228-240. Elsevier. DOI: 10.1016/j.jqsrt.2018.03.014 ISSN 0022-4073

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Official URL: https://www.sciencedirect.com/science/article/pii/S0022407317306507

Abstract

In this paper we analyze the accuracy and efficiency of several radiative transfer models for inferring cloud parameters from radiances measured by the Earth Polychromatic Imaging Camera (EPIC) on board the Deep Space Climate Observatory (DSCOVR). The radiative transfer models are the exact discrete ordinate and matrix operator methods with matrix exponential, and the approximate asymptotic and equivalent Lambertian cloud models. To deal with the computationally expensive radiative transfer calculations, several acceleration techniques such as, for example, the telescoping technique, the method of false discrete ordinate, the correlated k-distribution method and the principal component analysis (PCA) are used. We found that, for the EPIC oxygen A-band absorption channel at 764 nm, the exact models using the correlated k-distribution in conjunction with PCA yield an accuracy better than 1.5% and a computation time of 18 s for radiance calculations at 5 viewing zenith angles.

Item URL in elib:https://elib.dlr.de/120375/
Document Type:Article
Title:Radiative transfer models for retrieval of cloud parameters from EPIC/DSCOVR measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Molina García, Víctorvictor.molinagarcia (at) dlr.deUNSPECIFIED
Sasi, Sruthysruthy.sasi (at) dlr.deUNSPECIFIED
Efremenko, Dmitrydmitry.efremenko (at) dlr.deUNSPECIFIED
Doicu, AdrianAdrian.Doicu (at) dlr.deUNSPECIFIED
Loyola, Diegodiego.loyola (at) dlr.deUNSPECIFIED
Date:July 2018
Journal or Publication Title:Journal of Quantitative Spectroscopy & Radiative Transfer
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:213
DOI :10.1016/j.jqsrt.2018.03.014
Page Range:pp. 228-240
Publisher:Elsevier
Series Name:Elsevier
ISSN:0022-4073
Status:Published
Keywords:Backscattering; PCA; Correlated k-distribution; Asymptotic theory; EPIC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Molina García, Víctor
Deposited On:18 Jun 2018 13:44
Last Modified:31 Jul 2019 20:18

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