The files in the tarfile are named according to their date of observation, asteroid name, and the beaming parameter used times 1000 (so 950 means 0.95, 1050 means 1.05, etc.). The .bin shows that the file was binned from its reduction output spectral resolution. 

Files have three columns: wavelength in micrometers, reflectance normalized to 2.30 micrometers, and uncertainty.