The measurements, including two points calculated by integrating gamma-rate records from Shot 4, are presented in Figure 3.1. Prediction curves (from Reference 7) and measurements during Greenhouse and Ivy (References 8 and 9) are also presented for comparison. One record of initial-ganima rate versus time up to shock~arrival time (0.9 seconds) was recovered after Shot 1. Two complete records (illustrated in Figure 3.2) were recovered after Shot 4. The shock-arrival times interpolated from Project 1.1 data are Lop TS Shot 2 - 1iMT Snot 3-013 MT Shot 4 - 70 MT Snot 6-17 MT Ivy Mike (Moiik } -i0.5 MT Previous Meosuraments TM 23-200 Predictions Roentgens 10 MTb—— 103k Greenhouse 0.08 MT Range , 10% Yords Figure 3.1 Initial gamma exposure versus distance. indicated on the figures. of the gamma-rate curve. Apparently, this time is associated with the break in the slope The integration of these curves indicates that the exposure at the 7,171-foot station was 1,000 r before shock arrival and 16,800 r after arrival. The corresponding exposures at the 13,501~-foot station were 14 r and 109 r. Therefore, 42