Fig. 4
From: On the effect of emergence angle on emissivity spectra: application to small bodies
Serpentinite slab emissivity measured under purged air for increasing θ; emissivity spectra of serpentinite slab sample measured under purged air at 100 °C surface temperature, for increasing emergence angle (θ), calibrated with respect to a blackbody at the same surface temperature, measured under nadir viewing geometry. 1−R (R = bi-conical reflectance) is shown for comparison too