ATBD User's Guide Reference Guide	ATBD (ASTER Algorithm Theoretical Basis Documents) provides explanation of algorithm and theoretical basis for processing ASTER standard product etc. This ATBD is available in PDF edition only. ProductNo. Standard product File size date 1A 1B Reconstructed, unprocessed instrument data Radiance registered at sensor 1.2M Nov 96 2A02 2A03 Relative spectral emissivity Relative spectral reflectance (D-stretch) 663K Mar 99 2B01 2B05 Surface radiance (VNIR, SWIR) Surface reflectance 740K Mar 99 2B01t Surface radiance (TIR) 264K Feb 99 2B03 2B04 Surface temperature Surface emissivity 765K Mar 99