Table 9: Model fit parameters of the October 2000 narrow band and November 2000 L' band data and of the November 2001 data of U Ori. It was not possible to estimate useful error bars for several of the parameters with the 2000 dataset.
Year 2000 2001

$R_{\star}$ (mas) $5.30\pm-$ $4.83\pm0.06$

$R_{{\rm layer}}$ (mas) $12.88\pm-$ $12.00\pm0.03$

$T_\star$ (K) $3053\pm-$ $3106\pm53$

$T_{{\rm layer}}$ (K) $1526\pm-$ $1921\pm26$

$\tau_{2.03}$ $0.82\pm0.05$ $0.23\pm0.01$

$\tau_{2.15}$ $0.35\pm0.03$ $0.09\pm0.01$

$\tau_{2.22}$ $0.24\pm0.02$ $0.07\pm0.01$

$\tau_{2.39}$ $0.42\pm0.23$ $0.22\pm0.01$

$\tau_{{L'}}$ $3.28\pm1.24$

**Table 9:** Model fit parameters of the October 2000 narrow band and November 2000 L' band data and of the November 2001 data of U Ori. It was not possible to estimate useful error bars for several of the parameters with the 2000 dataset.
Year	2000	2001
$R_{\star}$ (mas)	$5.30\pm-$	$4.83\pm0.06$
$R_{{\rm layer}}$ (mas)	$12.88\pm-$	$12.00\pm0.03$
$T_\star$ (K)	$3053\pm-$	$3106\pm53$
$T_{{\rm layer}}$ (K)	$1526\pm-$	$1921\pm26$
$\tau_{2.03}$	$0.82\pm0.05$	$0.23\pm0.01$
$\tau_{2.15}$	$0.35\pm0.03$	$0.09\pm0.01$
$\tau_{2.22}$	$0.24\pm0.02$	$0.07\pm0.01$
$\tau_{2.39}$	$0.42\pm0.23$	$0.22\pm0.01$
$\tau_{{L'}}$	$3.28\pm1.24$

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