1592952553000 1312632483000 term-3165 1616541572770 1312632487000 1616290562065 adlib fitz-online adlib-term-3165 eb9687cc-4304-3bbd-840c-fad8a66bf80b 2 1 coefficient, reflection coefficient, reflection term reference term-3242 adlib-term-3242 be6b8315-4765-36fd-93a5-ed68137a5c9a reflectance