| RG US DOE ARCHIVES 326 US ATOMIC ENERGY COMMISSION HBox Bre— Polder Weather Bureau Work for the Division of Biology and Medicine, U. S. Atomic Energy Commission - FY 1959 C ¥ 41 PROGRESS REPORT rotection Filee Le |Peerean- Operation Hardtack, Phase I. During the operation, daily maps of the trajectories of the debris from each of the shots were prepared, toget with forecasts of future movement, and transmitted to the AEC. was provided where necessary. Consul Other interests, such as the National A iation of Photographic Manufacturers were notified when significant co: ation was expected. Reports of umsual activity received during this were related to possible trajectories. The Western Pacific upper air program data were investigated in terms of the debris trajectories. Finished maps of the trajectories have been prepared, together wi! the upper-air wind and temperature data associated with each burst. I of the observed air concentration near the ground over the U. S. as me by the Public Health Service Radiation Surveillance Network, have been prepared, and will be incorporated with other monitoring data, such as gummed-film network, when they become available. Interpretation of preliminary W-185 data from Hardtack ylelded sig new information concerning the movement of trospospheric and stratosphe debris from Pacific tests. Operation Hardtack, Phase II As in other test series, daily maps of the trajectories of the det were prepared and consultation service was provided to the AEC and othe Daily estimates of areas of fallout were prepared and relayed to intere groups as appropriate. Departmert of Fne sported Historian's offig ARCHIVES high fallout. STATUS VERIFIED ¢/x/(¢L- BY fn we Special studies were made in certain cases of thie DATE NON-CCRP S/ 22/8)

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