SULOUR:RaSh Betti RAY A T A and 2,11, 7018993 The Koa hodograph shows that for this event the winds were ideal for height HNne sampling since material falling from the light and variable layer would be clearly isolated from the rest of the fallout, ; On Walnut, an overlap of particles originating in the cloud at 40,000 feet and at higher levels would be anticipated, For Oak the samples collected at 1000 feet would contain material which came from several different elevations in the cloud, 2.3.2 Koa Event, No rocket samples were collected from Shot Koa, In preshot planning it was intended that a salvoof 18 rockets would be fired into the cloud, 6 each from Sites Wilma, Sally and Mary. The firing line | to Site Wilma failed on the day before the shot and could not be repaired before evacuation, Firing circuits to Sites Sally and Mary were intact at shot time and a firing signal was transmitted to these sites at H t 7 minutes, but no rockets fired, Failure appears to have been caused by the heavy current drainby several launcher orienting motors dropping the main power supply voltage to a point where it was insufficient to operate critical relays in the local launch programming equipment. Thereafter, launching opera- tions were programmed so that only a single Javncher motor would be operating at one time, Five samples were taken from the cloud by B-57D aircraft at 3-1/2, t, 8, 11 and 28 hours post-shot time (See Table Rl). A flight scheduled for S?..