ant DELETED: (DAKOTA) Project 11.2 = Cloud Sampling ~ H. F, Plank P. F. Moore Equipment: Nine Aircraft equipped for cloud sampling as described in the DELETED| report were used on this mission: "A" Flight, Tiger Red one (F-84); "B" Flight, Mger Red Two (F~84); "C" Flight, Hotshot 1 (B+57); "D" Flight, Hotshot II (B~57); "E" Flight, Hotshot III (B57); "F" Flight, Hotshot IV, (B-57); Control, Cassidy (B-57); and Tiger Spare 1 & 2 (2 Fa84'8). * Weather: There was a thick cirrus overcast from 37,000 to 45,000 ft. which largely obscured the bomb cloud at most altitudes in which sampling aire craft were operating. Wind shears were not particularly favorable for sampling, and velocities were moderately high. Cloud Description: The cloud rose through the cirrus layer at 37,000 to 45,000 feet where it was completely obscured and was almost impossible to see above that level due to haze and condensation of natural clouds around the bomb cloud. Only a very small tail extended below the cirrus at 37,000 ft. Cloud color was very light, which increased the confusion with natural clouds, The upper umbrella of the cloud extended back almost all the way from Bikini to Eniwetok and sampling aircraft returning to Eniwetok at higher altitudes encountered patches of radioactive cloud material, Cassidy estimated the maximum cloud height at 62,000 ft. plus or minus 2,000 ft. COPIED/DOE LANL RC ~49 - eugar> 6K