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Table 2

Formation heights for the bisector levels.

Line h lower h max h upper

0.2 10 75 150
0.5 40 100 180
0.75 70 140 350
1.0 345 420 540

Notes. The line depressions are relative to the central depression of the line (see also Fig. 1). hmax is the height in km where the contribution function of the line depression is at maximum, hlower and hupper are the lower and upper heights where the contribution function is at half maximum.

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