Hyperspectral images for "Successes and challenges of factor analysis/target transformation application to visible-to-near-infrared hyperspectral data

These are the VNIR hyperspectral images used in Tarnas et al. (2021) Successes and challenges of factor analysis/target transformation application to visible-to-near-infrared hyperspectral data, Icarus, https://doi.org/10.1016/j.icarus.2021.114402 These hyperspectral images are of "Mars trays", which consist of binary mixtures of either kaolinite, calcite, nontronite, montmorillonite, and gypsum with Mars Global Simulant (MGS-1; Cannon et al. (2019): doi.org/10.1016/j.icarus.2018.08.019). In these images, there are pure endmembers of each mineral, a pure MGS-1 endmember, and mixtures with 50%, 20%, 10%, 5%, 2.5%, and 1% abundance of each mineral that is mixed with MGS-1. Each endmember and mixture is separated into individual trays. Grain sizes for the minerals mixed with MGS-1 are either 45-75 microns, or 125-250 microns with a few grains larger than 250 microns. The wavelength range with high quality data is 1.0-2.5 microns and the spatial resolution is 0.34 mm/pixel. There are corresponding RELAB measurements of each of these mixtures and endmembers. There is tape on top of the black background material, which was used to maintain consistent positioning of the trays. See Tarnas et al. (2021), Icarus, for more details.