http://worldcat.org/entity/work/id/137101894

SHOCK WAVE PHOTOGRAPHY

The project was responsible for (1) determining the peak shock overpressure as a function of distance on Shot 10, the high-altitude shot; (2) studying the effects of the surface and the heating of the air near the surface on precursor formation, growth, and shock interaction for a number of yields and heights of burst over natural and artificial surfaces; and (3) ascertaining, prior to Shot 12, whether coalescence of the incident and reflected shocks could be expected to occur directly above the burst and, if so, determining the peak overpressure at given distances on that shot. Both smoke-grid photography and direct-shock photography, techniques similar to those used on previous tests, were employed in the successful accomplishment of these major objectives.

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