Difference between measured (dashed line) scanning beams and simulated (solid line) beams (70 GHz channel). The color scale spans 2.25 times the rms of the beam difference and the units of the color bar are in thousandths of the peak height, i.e., 0.1% of the beam maximum. The contours correspond to –3, –10, –20, and –25 dB from the peak. The size of each patch is 50′ × 50′, centered along the beam line of sight.