Table 7.

RMSE and NRMSE of $a_t\mathit{\left(}\lambda \mathit{\right)}$ (m⁻¹), $a_{dg}\mathit{\left(}\lambda \mathit{\right)}$ (m⁻¹) and $a_{phi}\mathit{\left(}\lambda \mathit{\right)}$ (m⁻¹) estimates at different wavelengths, calculated from validation dataset (n = 50).

Wavelength (nm)	$a_t\mathit{\left(}\lambda \mathit{\right)}$		$a_{dg}\mathit{\left(}\lambda \mathit{\right)}$		$a_{phi}\mathit{\left(}\lambda \mathit{\right)}$
	RMSE (1/m)	NRMSE (%)	RMSE (1/m)	NRMSE (%)	RMSE (1/m)	NRMSE (%)
412	0.89	8.53	0.58	5.55	0.17	15.54
443	0.50	7.70	0.35	5.49	0.15	21.21
488	0.26	15.43	0.19	11.52	0.09	35.94
555	0.12	7.08	0.10	6.04	0.04	15.31
667	0.06	15.82	0.02	7.48	0.05	18.99
678	0.10	29.11	0.02	9.59	0.05	20.38
average	0.32	13.95	0.21	7.61	0.09	21.23