1083 these values of / to something like 272. Also, there may be appreciable balation on these filue and I would consider, for the moment, that the Parry - Eastman value of 265 is probably more reliable. If the fireball duta are then revised dowward, indicated by - = 268, the apparent yield from MIKE shot vill then be in the order of 10.2 megatons, even by the analytic solution. Figure 4 shows the time of arrival curve from MIKE in comparison with the predicted times of arzival for both 10 and 12 megatone, I have included acme preliuinary fireball points, from measurement at Bnitwetok, shows a9 orceses, and the firetell curve resulting fron a 7 of 268 show as 6 @eahed line. Sandia's nensured times of arrival are shown by circles, In view of the excellent correlation obtained by this same prediction on KIM, the times of arrivel at 8300 feet and 16,000 feet scem significantly closer to 10 megatons than 12. Beyond 15,000 feet atmospheric inhomogeneity vill regult in later times of arrival. Only one point on the tine of arrival curve is high, at 36,000 feuts this point was not included by Cox in bis most recent publication of resulta; I have carried it over from the estimates on Parry to sdow that there is a reasonable possibility, although auall, that the time of arrival curve is Like 12 magatons in this region, and thet on Eatvetok it had been included as part of the judgement that the time of arrival curve was reasonable for 12 megntons. BEST COPY AVAILABLE Figure 5 shows the peak pressure ve. distance curve for NIKE) generally two different pressures were measured at the seme distances. At 16,000 feet, Cou has revised the preseure dowward from an original 23.6 pei down to 6 spread between 90.2 ani 17.5 pei. hie was a station close to vater and had @ fairly good wave form I think this downmerd revision ie again evidence that 12 megstons is high in this region. Further revision was mde by Cox in revising SNL