HFTA output for a beam heading of 75 degrees, comparing my low antenna (in red) to a dipole antenna over flat ground and up 1/2 wavelength (in blue). My antenna outperforms the dipole by several dB at low takeoff angles thanks to the downsloping terrain. Low takeoff angles are best for long-distance communications. The bar graph along the bottom shows the relative probability of signals from the U.S. arriving at various takeoff angles. My antenna was running roughly North-South (maximum signal to the East-West) so these comparisons are valid. However, my antenna was in the inverted-V configuration as opposed to a flattop dipole, so the terrain effects may not have been quite as significant as shown here (i.e., my antenna may not perform quite as well as shown).