enGnum hence, permit a determination of the yield of the device. There are photo stations on various islands in the Bikini Atoll and in addition aircraft will be at various positions above the islands, Other cameras in the same stations are used for other purposes; for instance, a fan of rockets will be photographed to study blast effects. Cannisters will be dropped by parachute from an aeroplane just before zero time and will telemeter free air blast information to receiving stations, The position of the cannisters will be determined by cameras. Some military effects studies are being made, Fall-out stations all around the atoll will measure the fall-out activity as a function of time, and will also collect the actual fall-out material as it comes down, for further study in the States. Similar stations are on rafts in the lagoon, on anchored skiffs outside the lagoon, and on manned ships further away in the fall-out pattern, The intensity and color of the device light will be measured, The characteristics of the water wave produced in the lagoon will be studied, Many different aeroplanes will be passing overhead to study the effects of blast and thermal radiation on those aircraft, positioned by radar, The aeroplanes are accurately The system on the ground and in the air is tied together by the timing station on Enyu which sends out time Sipnais by wire and radio to all stations needing timing. Control centers on the Command Ship ESTES make sure the whole operation is proceeding properly, Thus, you can see that we have here a tremendous outdoor laboratory, but for some shots, it is none too large, -~ 12 - Appendix "B"

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