first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S Howell VISNIR Howell 1994JGR....9910847H PHOT S 0.937 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT S 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC Sk Bus VIS Bus 2002Icar..158..146B SPEC Sq Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC