Table 2.

Mean and standard deviation values of plasmonic dip from three methods in sinθ unit.

	Plasmonic dip in sinθsp
	Cubic polynomial		Horner's method		CNN
	μ	σ	μ	σ	μ	σ
Air		5.52 × 10–6		4.39 × 10–6		3.32 × 10–6
N2 at 5 psi	0.67843	5.05 × 10–6	0.67842	4.70 × 10–6	0.67841	3.54 × 10–6
N2 at 40 psi	0.67881	5.93 × 10–6	0.67894	4.22 × 10–6	0.67883	3.69 × 10–6
N2 at 110 psi	0.67986	5.86 × 10–6	0.67986	4.55 × 10–6	0.67969	3.77 × 10–6
N2 at 130 psi	0.68013	5.33 × 10–6	0.68014	4.49 × 10–6	0.67996	4.06 × 10–6
N2 at 150 psi	0.68046	5.84 × 10–6	0.68047	4.74 × 10–6	0.68042	3.85 × 10–6