Awe stmated dose rate O° Operation Operation Gamma Dose Rates \ Redwing on Rongelap Island Milliroentgens per hour at D+l Hardtack A From Dunning 1957 O University of Washington ———Theoretical decay T™'@ Theoretical decay of yess fission products as measure by the AN/PDR-39 (TIB) 7 radiac at 3 feet above an infinite plane (Miller and Loeb, 1958) Marchi 1072 qT 10 t of 2 1955 ‘56 ‘37 58596 163 tt Lt 10 T 3 10 Days after March |,1954 and Marchi of each year indicated Fig. 2. Decline of Gamma Dose Rates at Rongelap Island. 13