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TitleFusion of MODIS land channels to produce regional time series of multispectral surface albedo at 250m and 10-day intervals for climate change and terrestrial monitoring applications
 
AuthorTrishchenko, A PORCID logo; Luo, Y; Khlopenkov, K V; Park, W M
SourceRemote sensing for environmental monitoring, GIS applications, and geology VII; by Ehlers, M (ed.); Michel, U (ed.); Proceedings of SPIE, the International Society of Optical Engineering vol. 6749, 2007, 10 pages, https://doi.org/10.1117/12.737193
Image
Year2007
Alt SeriesEarth Sciences Sector, Contribution Series 20070267
PublisherSPIE
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; Nature and Environment; remote sensing; satellite imagery; MODIS; Climate change
Illustrationssatellite images
ProgramEnhancing resilience in a changing climate
AbstractThe Moderate Resolution Imaging Spectroradiometer (MODIS) is a unique source of rich spectral information useful for many applications. It provides observations in 36 spectral bands ranging in wavelengths from 0.4mm to 14.4mm with a spatial resolution from 250m to 1km. The standard MODIS data processing system and products cover the basic operational needs for a number of products and applications. Implemented globally they, however, cannot always make the best use of MODIS 250m and 500m land channels required for terrestrial monitoring and climate change applications. To address the need of regional users in enhanced MODIS data, especially in terms of spatial resolution, an independent technology for processing MODIS imagery has been developed. It uses MODIS level 1B top of the atmosphere swath data as input. The system includes the following steps: 1) fusion (downscaling) of MODIS 500m land channels B3-B7 with 250m bands B1-B2 to obtain consistent 250m imagery for all seven bands B1-B7; 2) re-projection of 250m bands into standard geographic projection; 3) scene identification at 250m spatial resolution to obtain mask of clear-sky, cloud and cloud shadows; 4) compositing clear-sky pixels over 10-day intervals; 5) atmospheric correction; 6) landcoverbased BRDF fitting procedure. The fusion technique is designed to work with MODIS/TERRA data due to known problems with band-to-band registration accuracy on MODIS/AQUA. The developed method is applied to generate MODIS clear-sky land products in the Lambert Conformal Conical (LCC) projection for Canada and the Lambert Azimuthal Equal-Area (LAEA) projection for the North America and the Arctic circumpolar zone. The novel clear-sky compositing approach is proposed that significantly reduces impact of BRDF effect on raw composites by separation of pixels into two ranges of relative azimuth angle within 900-2700 and outside of this interval.
GEOSCAN ID224287

 
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