SPIRES Snow Reflectance Lookup Tables

Pre-computed lookup tables (LUTs) for the SPIRES (SPectral Inversion of REflectance from Snow) algorithm. These LUTs are generated using Mie-scattering theory and model snow reflectance across varying conditions:- Snow grain sizes- Dust concentrations - Solar zenith angles- Spectral bands (MODIS and Sentinel-2) Contents:1. lut_HLSS30_b1to13_3um_dust.mat (105 MB) - Lookup table for Harmonized Landsat Sentinel2. lut_modis_b1to7_3um_dust.mat (562 MB) - Lookup table for MODIS3. lut_oli_b1to7_3um_dust.mat (59.9 MB) - Lookup table for Lansat OLI4. lut_sentinel2b_b2to12_3um_dust.mat (70 MB) - Lookup table for Sentinel-2B bands 2-12 with dust parameters (9 bands) These tables enable rapid spectral unmixing to retrieve snow properties (grain size, dust concentration, fractional snow-covered area) from satellite imagery without re-computing radiative transfer models. Note: The Sentinel-2 LUT is also available in the SpiPy GitHub repository for convenience in testing. Related software: https://github.com/NiklasPhabian/SpiPy Original SPIRES algorithm:Bair, E. H., Stillinger, T., & Dozier, J. (2021). Snow Property Inversion From Remote Sensing (SPIReS): A Generalized Multispectral Unmixing Approach With Examples From MODIS and Landsat 8 OLI. IEEE Transactions on Geoscience and Remote Sensing, 59(9), 7270-7284.https://doi.org/10.1109/TGRS.2020.3040124