Table 2.

Values of the threshold D^th expressed as percentage of D^{A, max}.

r (cm)	${\text{F}}_{nu}^1$ 20%	${\text{F}}_{nu}^2$ 20%	${\text{F}}_{nu}^1$ 40%	${\text{F}}_{nu}^2$ 40%	Mean
0.32	88	86	75	75	81
0.5	86	88	77	78	82
0.76	88	84	77	81	83
0.5; 0.24	87	87	80	78	83
Mean	87	86	77	78	82