i think it is supposed to calculate the effect of a blast - given such parameters as height of detonation and charge, it estimates the fallout and how it is spr

i think it is supposed to calculate the effect of a blast - given such parameters as height of detonation and charge, it estimates the fallout and how it is spread out by prevailing winds. They used to have a paper-wheel calculator for that https://www.fourmilab.ch/bombcalc/ https://www.fourmilab.ch/bombcalc/ ; this is the online graphical version for the 21st century.