PROGRAM 1 = BLAST MEASURCMENTS 1.1 Blast Measurements by Photography (NOL—C. J. Aronson) lela Free Air Pressures (Rocket Trails) 1.lb Precursor Phenomena (Rocket Trails) ry pbele Asked Base Surge Phenomena ithe reason for making free-air pressure measurements, Hlunda replied that‘this is just about a routine measurement with then, in other words, they féé]}that in the indefinite future they should get this at every opportunity they can. If there is an operational reason on same particular shot’for not making these, they might be willing to give a point. It was agreed! that the object is to get in the state where one can predict with the accpracy desired. However, they do not think they are in that state yet, for-hi'gh-yjeld weapons. 4 Porzel stated that lds: far as the values on Mike are concerned, even the enormous perturbation,-which enters because of its being a surface burst makes very little difference.,The details,the rate of change of the fireball growth curve, are typical on Mike of a agreement with King on the fi rockets on King. He felt the of the scaling laws. and ezasults demonstrated the basic validity oO Ogle suggested that while t information than is already available easurement may not yield much nore data from higher regions which are in a think the rockets would go up high en tively simple experiment and one should 1.2 situation, in beautiful the raw data as measured by he ground, it might give valuable able atmosphere. ‘met throw away data. Air Overpressures as Function of Time i: (BRL, SRI, Sandia) Aronson did not for that, but said this is a camparaand Distance Along the Ground This would be similar to Cox's work on about the Mike shot scale of effort as a check po: rm , and is proposed on on lel. Ogle questioned this on the basis that there seems to be reasonable! agreement on :like between prediction and measurement. Scoville said this is not tfiie in higher pressure ee they do agree— regions. Porzel said the mortars caught some of these ; further out, and but; pressures higher not was meant DOD the he thought what that the cqmmented Ogle homogeneity. atmospheric varying with this has to do investigation further need atmospherics with do ons to things having C fidd Ley Bewonee™ -2]-