SECTION 4. SUMMARY OF AVAILABLE CONTOUR RATIO SCALING DATA <> THE EVALUATION OF CONSTANTS AND PARAMETERS FOR THE CONTOUR RATIO SCALING FUNCTIONS . Values of the mass contour ratio (evaluated at 1 br after detona- tion), the specific activity of the fallout and activity per unit area for several test detonations are given in Table 1 along with the distance from zero point and the 1 M? scaled distance from GZ. The 1 MI scaled distances were calculated from@ X29. WOM sy WerltoI2e (26a) x = 2.92 WO? 16 x, We 12 to > 104 x (26b) where X is the 1 MI scaled distance and x is the measured distance. Ideally, x would be the downwind distance along the center line of the fallout pattern or an average distance on the ground along the path of the particles for those arriving at a given location under similar meteorological conditions. Corrections in x for these factors were not made in the data of Table l. The values of the mass contour ratios for the several shote range generally from about 2 to 200 (mg/sq ft)/(r/br at 1 br) with the values for the underground detonation (JANGLE "U" Shot) and the detonation 2: Navajo) being the largest and the above D*eurface detonations (PLUMBBOB Diablo and Shasta) being the smallest .* DOE/NV #The discrepancy in the two M,(1) values for both Diablo and. Shasta results from calculation of the first M.(1) value from the gross sample weight including the desert sand blown into the collector by the blast wave (or settled down afterward). ‘The lower values were obtained after the fallout particles were separated from the gross sample by a magnet. The fallout particles contained about 5 % Fe by weight. z7 ie 16 = .