= 0.198 5632r x 0.198 = 1115r x 1.3 bution. =l449r = 1450r which is the soil contri- (U) To correct the burst conditions to standard air density the following formulae for correcting the slant range and dose must be used. Standard density, ps, is defined as 1.293xl0~g/om*, the density of dry air at O°C-and one atmosphere pressure. The corrected slant range, Rs, is given by and the corrected dose, Ds» is given by with p/p, given by Po p/p, = 0.269 = (C, - G + -Co +...) where C, = 1 Cy = 1/2(0.269x10p, g y/T), Cy = 1/6(0.269x10~7 ps g y/t)* 3 Cy = 1/24(0.269x10~ p, g y/T) Py = pressure at the detector, mb g = acceleration due to gravity, cm/sec* T = temperature, °K y = height of burst, cm (U) The slant range and dose-correction factors were so calculated by approximating p/p, via the parameter y/t that only those C's whose values were equal to or greater than 0.01 were included. Inclusion of only Cy assumes, in effect, a constant density between source and detector. Inclusion of.C, and Cy assumes a linear variation in density with height between source and detector. Inclusion of all the C's assumes an exponential variation in density with height. 224