A vector of names useful for extracting subsets of spectra from
the sensors.mspct object.
Note
'Berger' UV-Biometer (Fig. 1 in Berger, 1994). Digitized with 'enguage' from manufacturers brochures. These are approximate data, both because of the digitizing process, and because they are either typical values or for a particular sensor unit. Individual sensor units are expected to differ to some degree in spectral response.