Ae Estimated dose rate at Dt+i O Gamma Dose Rates on Rongelap Island Milliroentgens per hour lo? Operation Operation NN Redwing Hardtack A From Dunning 1957 O University of Washington ———Theoretical decay T!? Theoretical decay of ue fission products as measure by the AN/PDR-39 (TIB) 7 radiac at 3 feet above an infinite plane (Miller and Loeb, 1958) March! 107? l ' 10 10° 1955 l . i ‘56'5758596163 | J} ti jt T 10° Days after March 1,1954 and Marchi of each year indicated Fig. 2. Decline of Gamma Dose Rates at Rongelap Island. 13