rectangular-coordinate graph of the measured radiation, shown in

figure 4-11, view A, is a straight line plotted against positions around the

circle. View B shows the polar-coordinate graph for the same isotropic source.

4-55. In the rectangular-coordinate graph, points are located by projection

from a pair of stationary, perpendicular axes. In the polar-coordinate graph,

points are located by projection along a rotating axis (radius) to an

intersection with one of several concentric, equally spaced circles. The

horizontal axis on the rectangular-coordinate graph corresponds to the circles