Monte Carlo simulation of ground flashes
The first two values, namely Ip and tf for first return strokes, are assumed to follow
the two-step log-normal probability distributions adopted by Anderson and Erikkson
[B5] and CIGRÉ [B27].
Note that Equation (5) follows the trend of the CIGRÉ two-line distributions
comparatively well [B27].
The Monte Carlo method selects random values used to generate distributions for
negative first return-stroke parameters found in Table B.1.
The numerical method, see Borghetti et al. [B22] includes a correlation coefficient
between tf and Ip, equal to 0.47 found in Anderson and Eriksson [B5].