Predicted Distance

(m)

USBM Model

Gustaffson Model

Oxide

(41.1)*

Transition

(42.4)*

Fresh

(44.9)*

Oxide (41.1)*

Transition (42.4)*

Fresh (44.9)*

250

2.31

2.36

2.44

1.91

1.94

2.00

300

1.88

1.91

1.97

1.67

1.70

1.75

350

1.57

1.60

1.65

1.49

1.51

1.55