The Normalization of Surface Anisotropy Effects Present in SEVIRI Reflectances by Using the MODIS BRDF Method
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Date
2014
Authors
Shisanya, C.A.
Proud, Simon Richard
Zhang, Qingling
Schaaf, Crystal Author
Fensholt, Rasmus
Rasmussen, Mads Olander
Mutero, Wycliffe
Mbow, Cheikh
Anyamba, Assaf
Pak, Ed
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
A 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 BRDF-adjusted 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.
Description
DOI:
10.1109/TGRS.2013.2294602
Keywords
Angular effects, MODerate resolution Imaging Spectroradiometer (MODIS), Meteosat Second Generation (MSG), Spinning Enhanced Visible and InfraRed Imager (SEVIRI), anisotropy bidirectional reflectance distribution function (BRDF), land surface reflectance
Citation
Geoscience and Remote Sensing, IEEE Transactions on (Volume:52 , Issue: 10 )Page(s): 6026 - 6039 2014