——— aeabidibin Instrumentation planned will be purely photographic and we would utilise rockets to set up background grids, This is actually the technique that has been used numerous times in the past and it is presently being amended to include a high velocity, high capacity rocket which will give us additional coverage which will be netessary on the two Mt shots planned to be instrumented. The effective range, which worries chiefly Program 5, I can't give at the present time but this data will be forthcoming shortly. With respect to construction requirements, we have more or less settled everything for this project; fortunately they are at a minimum. We require only the building of a reef station SW of Nam, roughly 24,,000' on the reef, but this has been discussed with DWET. We plan to have seven men in the field from March 1 thru the required shots. In response to questions from the floor, Mr.. Hanlon stated that on Cherokee 5" rockets will be fired from Able at -15 seconds, and that 5" rockets and the Deacon rockets (long-range rockets) will be fired from a point approximately 12,000! SW of Able. On Zuni the rockets will be fired from the south side of Uncle, about in the middle, and they will be fired north and south, with a few Deacons being fired in a northerly direction. On the other two shots we have not yet firmed up position of the rocket stations. The maximum altitude of these rockets cannot yet be stated as they are still in the design stage, but when they go in the vicinity of GZ at a point &,000' west of GZ, in this case, the highest rocket will be roughly at an altitude of 30,000’, These emit a smoke trail which is merely a background, The photographic requirements will be consistent with the Mack station which will be available. Project 1.4 — Free Air Pressure at Altitudes - Lt Col James A. Fava = AFCRC The objective of the project is to obtain additional experimental data on the effects of altitude on the propagation of a shock wave. In order to accomplish our objective we plan to have 16 parachute borne canisters spaced over GZ for shot Cherokee, which is the air drop. These canisters will be so spaced that they will measure overpressures in the range of 20 psi down to one psi. This means an altitude of approximately 16,000' up to 40,000'. We hope to drop them from either a B-36 or Bei7, this has not been determined as yet, from an altitude of approxi- mately 45,000', They will be in a vertical array above GZ. The information will be telemetered to a ground station located on an LSD 50 to 100 nautical miles away. We hope to use a frequency of from 215 to 230 mcs, We will have three K-35 trailers and three K-52 trailers to be shipped from the west coast to Eniwetok Atoll, and then off loaded from the prime mover to an LSD, The canisters themselves we hope to fly aboard the drop aircraft. We will have approximtely 24,00# 400 cu ft to be air lifted to Eniwetok by MATS. There will be approximately 17 to 20 personnel in the Eniwetok area, this is exclusive of air crews. They will be in the area from Cherokee -20 days to Cherokee #20 days. Constructime-wise, we have put in a construction requirement to AFSWP, which we asked for at Kwajalein where the aircraft was to be based, but I now understand it will be at Eniwetok, but we can change that. For preliminary positioning we have used the Ledsham = Pike method of scaling to plot an overpressure versus slant range curve. We have a photographic requirement for location of canisters at zero time,