Table 7.

Collection of Estimated Parameters and MSE.

Material	${\mathit{ϵ}}_{{\mathit{r}}_{\mathit{R}}}$	${\mathit{ϵ}}_{{\mathit{r}}_{\mathit{E}}}$	${\mathit{h}}_{\mathbf{rms}}$ (µm)	MMSE${}_{\mathit{a}\mathit{v}\mathit{e}}$
Wood	1.60–1.89	1.75–1.92	76.4–80.0	3.79 × ${\mathrm{e}}^{-4}$
Plexiglass	2.581–2.602	2.56–2.69	8.2–14.5	3.04 × ${\mathrm{e}}^{-4}$
Drywall	2.595–2.602	2.51–2.69	96.4–99.2	5.47 × ${\mathrm{e}}^{-4}$
Concrete	6.2–7.0	5.94–6.26	264.3–269.0	7.25 × ${\mathrm{e}}^{-4}$
Red brick	3.75	3.49–3.76	321.3–325.0	6.43 × ${\mathrm{e}}^{-4}$