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The Normalization of Surface Anisotropy Effects Present in SEVIRI Reflectances by Using the MODIS BRDF MethodA modified version of the MODerate resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) algorithm is presented for use in the angular normalization of surface reflectance data gathered by the Spinning Enhanced Visible and InfraRed Imager (SEVIRI) aboard the geostationary Meteosat Second Generation (MSG) satellites. We present early and provisional daily nadir BRDFadjusted reflectance (NBAR) data in the visible and near-infrared MSG channels. These utilize the high temporal resolution of MSG to produce BRDF retrievals with a greatly reduced acquisition period than the comparable MODIS products while, at the same time, removing many of the angular perturbations present within the original MSG data. The NBAR data are validated against reflectance data from the MODIS instrument and in situ data gathered at a field location in Africa throughout 2008. It is found that the MSG retrievals are stable and are of high-quality across much of the SEVIRI disk while maintaining a higher temporal resolution than the MODIS BRDF products. However, a number of circumstances are discovered whereby the BRDF model is unable to function correctly with the SEVIRI observations-primarily because of an insufficient spread of angular data due to the fixed sensor location or localized cloud contamination.
Document ID
20140010301
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Proud, Simon Richard
(Copenhagen Univ. Denmark)
Zhang, Qingling
(Yale Univ. New Haven, CT, United States)
Schaaf, Crystal
(Massachusetts Univ. Boston, MA, United States)
Fensholt, Rasmus
(Copenhagen Univ. Denmark)
Rasmussen, Mads Olander
(Copenhagen Univ. Denmark)
Shisanya, Chris
(Kenyatta Univ. Nairobi, Kenya)
Mutero, Wycliffe
(Kenya Wildlife Service Nairobi, Kenya)
Mbow, Cheikh
(Universite Cheikh Anta Diop Dakar, Senegal)
Anyamba, Assaf
(Universities Space Research Association Greenbelt, MD, United States)
Pak, Ed
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Sandholt, Inge
(Danish Technical Univ., Space Copenhagen, Denmark)
Date Acquired
July 29, 2014
Publication Date
January 1, 2014
Publication Information
Publisher: IEEE
Subject Category
Geosciences (General)
Report/Patent Number
GSFC-E-DAA-TN14413
Funding Number(s)
CONTRACT_GRANT: NNG04GP09G
CONTRACT_GRANT: NNG11HP16A
CONTRACT_GRANT: NNX08AE94A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
SEVIRI
Surface Anisotropy
MODIS
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