Forest Monitoring and Wildland Early Fire Detection by a Hierarchical Wireless Sensor Network

Figure 8

Tests carried out to check ISM communication performance between central nodes. In (a), the line routes between both nodes are shown, where distances are P1: 1.4 km, P2: 2.2 km, P3: 3.3 km, and P4: 4.8 km. In (b), the elevation map of these routes is shown. As it can be seen, all routes have line of sight.

(a)

(b)