(a) (b) (c)
Figure 1. a) structures A to F, where the leaders (also named A
to F) are initiated. A and B indicate the tips of the instrumented
lightning rods of buildings P1 and P2 respectively; b) downward negative
leader and positive competing leaders launched from the tip of the
lightning rods and other nearby structures; c) geometry of the return
stroke channel.
Table 1 - Structures that initiated upward leaders, leader
type, length, distance from the electric field sensor and time of leader
inception.