alysis and 7 We rHrow uphy of ? ‘ance data s of an Mach n which a corre»yredicting gr re range, rages obe wave of ‘ect shock § nstrumentedsurface he free two lines nplex. At ‘urve 3, or ** 2 pl remilaz +o high- and and at on was ed gages it the ‘ared sur- getated et: radius of an as etric crater about 270 ft (easterly along In additionEEower shot having a high kiloton yield, was surveyed for crater size. The results are not available at this time. Jeeps were exposed on three events in an investigation of the response of drag-sensitive targets. Good results were obtained and will supplement the damage-prediction curves by including the blast conditions resulting from these particular types of shots. Water-wave studies were made on the megaton-range devices. Instruments were placed to document the Bikini Lagoon waves, and at distant locations (Ailinginae-and Eniwetok Atolis, and Wake and Johnston Islands) to record the long-period ocean waves. Microbarographs were operated at Wake and Johnston to investigate the possibility that these long-period waves are air-coupled. Considerable inundation photography was taken. Wave action from in the Bikini Lagoon was less than expected, since the crater did not Dreach into the ocean or the deep channel and, apparently, there was unexpectedly great convergence and dissipation onto the near islands of the Eninman complex. These results, based on preliminary analysis in the field, must be considered as tentative. Blast records will be re-examined and reanalyzed at the laboratories. Photographic analysis cannot be accomplished at the proving grounds and must await laboratory study. However, a general statement of the accomplishment of this program can be made: With the exception of which the drop error affected the results of those projects participating, the objectives of the Program 1 projects were carried out. On all events a high percentage of instrumentation successfully operated at and through shot time, recording reliable data. information. Blast data have been obtained which will supplement existing. These data will extend presently established curves, and will strengthen the knowledge of blast phenomena in areas heretofore only meagerly instrumented or not documented at all. higher 2.1.2 d with 8. Meas2r by Program 2 was concerned with the distribution of radioactivity in the cloud resulting from nuclear explosions and the subsequent fallout of material from the cloud and with various nuclear radiation effects. Gamma ion chambers were fired into the cloud by high-speed rockets and the resulting gamma-rate data were telemetered to recording stations. Preliminary analysis indicates there is comparatively little activity in the 2, diameter 6 ft; and Destroyer escorts and the M/V Horizon were used to delineate the fallout pattern over water and to study the nature of the transport and re recorded of-burst jepth pro- Program 2, Nuclear. Radiation and Effects .. _ stem region and that cloud activity is in the lower portion of the cloud. - 29 - __