What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

To find the elevation angle of peak response in an elevation pattern, you must locate the furthest extended tip of the main lobe. This point indicates the direction of maximum radiated signal strength. Looking closely at Figure E9-2, the tip of the primary lobe points slightly above the horizontal 0-degree line. The angular markings on this specific plot are spaced in 15-degree increments. The peak of the lobe falls exactly halfway between the 0-degree horizon line and the first 15-degree mark. Therefore, calculating the midpoint gives an elevation angle of peak response of 7.5 degrees.