Ground-wave field-strength surveys at 100 and 600 Mc/s

The paper gives the results of an experimental investigation of the effects of irregular terrain on ground-wave propagation at frequencies near to 100 and 600 Mc/s, particular attention being paid to propagation characteristics at the higher frequency. Together with other work, these results clearly show that as the frequency increases so also does the amount by which the median observed field strength for any distance falls below the smooth-earth theoretical value.