Distribution functions of the HEMP environment

The EXEMP code (Theoretical Note No. 363) is employed to evaluate cumulative distribution functions and mean values of characteristic pulse parameters over the HEMP ground coverage area, e.g. peak electric field, peak rate of rise, energy fluence, impulse, and polarization. The influences of yield and height of burst are also considered. Bivariate cumulative distribution functions and the corresponding probality densities linking any two of the above parameters are investigated to derive HEMP environments less stringent than worst case.