Dependence of the resulting thermal inertia estimation on the input parameters: comparison with the nominal results. As a guide, in each plot, the results of our nominal estimation are shown as a dotted red histogram. The top panel shows the obtained thermal inertia distribution when the absorption coefficient, α, is set to 0.9 (blue histogram). The middle panel shows the results obtained assuming an emissivity, ε, of 0.9 (black histogram). The bottom panel shows how the thermal inertia distribution changes when a uniform input distribution of density, ρ, is assumed (green histogram).