OPERATION HARDTACK I - PPG Time Fig GMT TATE: 18 Aug 1908 18 Aur 1958 TIME: 1600 O00 Sponsor: SITE: UCRL - DOD FPG - Eniwetok - Yvonne 12° 33' 162° 21' #15" el" Site elevation: HEIGHT OF BURST: oN kB Sea level 1.5 ft TYPE OF BURST AND PLACEMETIT: surface burst trom platform i over Nave soil CLOUD TOP HEIGHT: 5,400 ft MS CLOUD BOTTOM HSTGHT: 4,300 ft MSL REMARKS: ~The dose-rate contours were obtained by ground survey readings made by scientific projects. Actual decay measurements were used to correct the dose-rate readings to H+tl hour. The portion of the pattern on the island is reliable. That portion which is over water is less reliable because it was not based upon free-field dose-rate readings but upon calculations made from readings taken on rive barges and from samples collected in sticky pans mounted on 87 buoys. 312