tween Sites Charlie and Dog. Data _polits were obtained at distances of about 3,000, 7,000, and 10,000 feet, wherethe initigh-€Suld separated from the residual radiation. In order to compare_tafs project’s initial-gamma data with data from previous high-yield shots, reference is made to the Nuclear Radiation Handbook (AFSWP-1100, Figure 3.2.6, page 65), which gives experimental values of DR2/W for various high-yield shots of Operations Greenhouse, Ivy, and Castle as compared to average values for a large number of low- and intermediate-yield (0 to 100 kt) shots. With the data of this figure as background, additional data from Redwing Shots Flathead, Zuni, Navajo, and Dakota, and Castle Shot Nectar are shown (Figure 3.9). The curves shown for Shots Flathead, Zuni, Navajo, Dakota, and Nectar are the lines of the least- square fit to the DR’/W-versus-R data normalized (at 2,000 yards) for a relative air density of p=1.0. This normalization was accomplished by adjusting the slope of the data line (while maintaining the zero-intercept constant) in a manner similar to that used in WT—1115 (Reference 3). Examination of the curves shown in Figure 3.9 indicates that project data agrees with data from all previous operations. The initial-gamma instrument station locations were selected with an expectation of 50 percent loss per shot; however, the losses were only about 25 percent. The residual instrumentation was nearly 100 percent effective. The secondary and improvised instrumentation for separation of initial- from residual-gamma radiation were only about 40 percent effective throughout the operation. 46