Surge characteristics of a buried bare wire

J. H. Hagenguth (General Electric Company, Pittsfield, Mass.): The author is to be congratulated on his mathematical analysis of the impedance characteristics of counterpoises for lightning currents. The author by using the fundamental constants of resistivity, inductivity, and resistivity of the earth arrives at values of surge impedance which begin at zero at the moment the current wave arrives, reach a maximum value, and decrease to a value equal to the ground resistance of the counterpoise.