Table 1.

Fitted optical properties of two-layer media used in Fig. 3.

Depth (cm)	μa1 (cm−1)	${\mu }_{s1}^{\prime }\left({\mathrm{cm}}^{-1}\right)$	μa2 (cm−1)	${\mu }_{s2}^{\prime }\left({\mathrm{cm}}^{-1}\right)$
True value	0.02	7	0.1	7
1.3	0.023	6.84	0.093	7.63
1.4	0.023	6.87	0.092	7.54
1.5	0.022	6.95	0.094	7.18
1.75	0.016	7.07	0.11	6.6
2.0	0.023	6.85	0.09	10.79