Fig. 5

Comparison between the thermal emission spectrum of a surface with RMS slope of 9° (solid line) and the thermal emission of a single black body with the best-fitting effective temperature T eff (dashed line).

(A) Incidence angle 60°. (B) Incidence angle 75°. The emissivity was computed on the basis of the reflectance spectrum of lunar highland sample 62231 (23).