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Code Manual for CONTAIN 2.0 - Federation of American Scientists

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determined from the definition <strong>of</strong> the width as the horizontal dividing line separating equal-area<br />

portions <strong>of</strong> the segment. The segment area is represented as a slab, and the width is given a ~<br />

nondefault value w equal to the arc length <strong>of</strong> the dividing line. In the case in which the dome is<br />

ellipsoidal, the surface is described by the surface equation<br />

z = c(1-x 2/a2-y 2/a2)1’2 (13-8)<br />

where c and a are the semi-minor and semi-major axes <strong>of</strong> the ellipsoid. The location <strong>of</strong> the equalarea<br />

line <strong>for</strong> the segment (91 e q < qz ,(11

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