Table 1 an coefficient extracted from6.

From: The impact of ground losses on estimations of lightning-induced voltage with dispersive soil parameters

n

1

2

3

4

5

an

3.4 × 106

2.74 × 105

2.58 × 104

3.38 × 103

5.26 × 102

n

6

7

8

9

10

an

1.33 × 102

2.72 × 10

1.25 × 10

4.8

2.17

n

11

12

13

14

 

an

0.98

0.392

0.173

0