4.8. Step 8: viewshed
Lastly, the visibility of each of the selected points is mapped. In this way, all the visible pixels in the range of radar can be identified centered on the observation points determined by the tactical criteria. Additionally, the height of the antenna, the vertical distance above the horizon and the direction the radar should search can be specified. In this study, for the viewshed operation the following parameters are utilized: scanning radius 1200 m, Direction for radar scanning: 360 and vertical distance above the horizon 2.5 (see Fig. 5).