@ mentally a blast measurement. @ Ad O1 The rate of grovth curve is iteelf diagnostic; ao 4 it shows a predominance of the rediative phase over mass effect during the oe early growth, und is characteristic of a bomb of very high yield to mss re ratio; this was expected because 600 tons of structure around MIKE, compares ag to only 1200 lbs. around a 12 KT veapon. As expectéd, the energy transfer to the ground vas very small, no large abnormalities were introduced because of proximity to the surface, metxical. ‘The shock wave wes clear and essentially syn- od There is no reason to suspect scaling does not spply, because, for 24 the first time on any operation, the “fireball yield" was determined on an absolute, instead of relative, basis, using an analytic solution only recently developed. The saue solution had given good agreement with radiochentstry when applied to bombs of previcus operations. As shown below, the fireball yield is consistent with the interpretation of hydrodynamic data appearing below, so that even if the fireball yield is in eventual disagrienent with redicchemistry yields, the fireball yield will ve necessary for interpretation of hyttrodynamic data. on, Inhomogensity,Aftervinds BEST AYAILASLE COPY Pertinent measurements were wade by Sandia Corporation in Project 6.1 “Pressure Time”, and 6.3 - “Bhock Winds and Aftervinds"; by Los Alamos Scientific Laboratory in Project 6.2 - “Air Mass Motion Studies", and Project 6.3 - "Afterwinis") by Wright Air Development Center in Project 6.10 - “Tree Air | Pressure, Manned Aircraft”; and by Air Force Cambridge Research Center in Project 6.11 - “Free Air Pressure, Parachute Cannisters". La Preliminary con- cluaions drewn here from test results are based on comparison with the predic-~ tions under ideal conditions, in Annex A, J-12372, “Report of Evacuation Plans Conference". | E SNL. Jad. 4 ko, rom Ba FP