DEVICE INFORMATION TABLE 2.1 Koa Total yield, Mt’ Walnut Oak 1.31 2 0.08 9 + 0.6 Fission yield, Mt Location Site Gene Near Site Janet 4 miles south of Site Shot time and date 0630 M 13 May 1958 0630 M 15 June 1958 0730 M_ 29 June 1958 Shot type Land-surface Water-surface, fired Water-land surface, from a barge in deep water fired from an LCU anchoredin 15 feet of water over the lagoon reef Alice TABLE 2.2 CLOUD ALTIT UDE DATA Approximate altitude in feet. Koa Walnut Oak Tropopause 57,000 §4,000 50,000 Light and variable layer 60,000+ 55,000 55,000 Cloud top, expected* 72,000 72,000 99,000 Cloud top, observed 65 ,000 61,000 70,000 to Sampling flights 60,300 56,500 75,000 56,300 * Reference 71. 29