An Algorithm for Evaluation of Lightning Electromagnetic Fields at Different Distances with respect to Lightning Channel

Table 1

The widely used channel base current functions.

Current model	Channel base current function
Bruce and Golde [29]
Improvement of Uman and McLain on Bruce and Golde function [30]
Improvement of Jones on Bruce and Golde function [31]
Pierce and Ciones [32]
Heidler function [33]
Sum of two Heidler functions [11, 34]
Improvement of Nucci on Heidler function [35]