Gain curves for various receivers and freq (ps) ( .pdf ) are plotted versus zenith angle. (last updated 22nov05) . ... The colors are for different receivers. For the same receiver, different frequency measurements use different plotting symbols. ... The solid line has averaged over azimuth, the dashed line has taken the maximum azimuth value for each measurement (all at a za of 10 degrees). ... For more info on the gain curve fits and their location see gain curves fits at ao . ...