You might enjoy the ECOSTRESS Spectral Library [1]. It has downloadable reflectance spectra overlapping with your sensor for a variety of materials. These spect

You might enjoy the ECOSTRESS Spectral Library [1]. It has downloadable reflectance spectra overlapping with your sensor for a variety of materials. These spectra are collected in highly controlled lab conditions for pure material samples. Could be useful for calibration or making your tricorder ;) I do consulting work in this area, in case you've ever got questions or could use a hand developing something. [1]: https://speclib.jpl.nasa.gov/ https://speclib.jpl.nasa.gov/