Seeeneeeeee OPERAWION DATE: TIME: REDWING - PPG Time 2 May 19,6 0556 Zuni GMT Sponsor: 27 May LOSC 1756 SITE: Ucn, PPG - Bikini - Tare 118 egt 165° 22! TOVAL YIELD: 3.5 mt Site elevation: HEIGHT OF BURST: FIREBALL DATA: “ Pime to lst minimum: Time to 2nd maximum: Radius at 2nd waximum: CRATIR DATA: UB" og" ON ¥# Sea Level 9 ft 160 + 184 msec 1.705 + 2.15 sec 5,208 ft Diameter: 2,310 ft Depth: 103 ft Lip: No apparent lip TYPE OF BURST AND PLACHMSNT: Surface burst from platform on coral soil and over water CLOUD TOPWIGHT: 79,c0O0 ft MSL CLOUD BOTLOM iKIG! 4G,000 £ MSL REMARKS: The on-site fallout pattern was drawn from island readings taken by scientific project 2.65 supplemented by fallout sample collection on rafts and barges in the lagoon. The measured field decay expontne was used to extrapolate the dose-rate readings to I41 hour. It was observed that the water adjacent to the benches of the northern islauds cf the atoli was pene.ally much more hishly contaminuted than the islands. The off-site fallout pattern was drawn from oceanographic surveys. he oceanographic surveys used detector probes for measuring the doserate at the surtace, plus the allied equipment necessary for measuring the dose-rate at depths to and below the thermocline (watcor-sampling equipment for the taking of surface samples and for the collection of samples from any desired depth). The dose-rate readings were extrapolated Lo WL hour by using the decay measurements ot the samples collected. The portion of fullout that penetrated below the thermosline is unknown. Rather than attempt to estimate the percentage, the results t'or the dose rates assume no ponetration beyond the depth «© mixing. 111