DELETED (DAKOTA) Project 9.1 = Technical Photography = Lt Col Jack G. James Three RB-50 Aircraft, Carter 1, 2, and 3, participated on this event. Positioning at H Hour was as follows: Carter 1, 70 Nautical Miles East of GZ at 20,000 feet; Carter 2, 70 Nautical Miles South of GZ at 20,000 feet; Carter 3, 50 nautical miles at 20,000 feet. Car~ ter 1 had an unrestricted view of the detonation and resulting cloud. Two photo runs of 15 minutes each were made with all cameras operating without malfunction. Carter 2 in the South Quadrant photographed the rise of the cloud up to 35,000 feet where the still rising cloud fused into a high cirrus layer. feet. A second 15 minute leg was flown at 25,000 Measurable results on this leg are probably negligible. All cameras functioned with the exception of the 16mm Color GSAP which had a film jam at plus 15 seconds. Carter 3, accomplished one and a half 15 minute photo runs before being blocked by a cirrus layer estimated at 40,000 feet. There were no camera malfunctions. All three air crews reported an extreme rapid rate of rise with the cloud starting to lose its identi+; at about plus 30 minutes. COnICD/por LANL RC - 42 ue,