Initial assessment of ATSR-2 data structure for land surface applications
Principal component analysis was used to assess the structure of 1 km spatial resolution data from the second Along Track Scanning Radiometer (ATSR-2). Results indicate that the nadir spectral data have a structure similar to Landsat Thematic Mapper data and could be reduced to two eigenvectors with a loss of under 10 per cent of the total variance. The dual-view spectral data could be reduced to three eigenvectors with a loss of under 12 per cent of the total variance. The thermal data may provide additional information to that contained in the spectral data at some sites. The physical basis of the data structure is interpreted. Thus, ATSR-2 data are of considerable interest for estimating land surface characteristics at a regional scale.
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