Tropospheric Propagation on Lower Radio Frequencies

Abstract

IN recent years the subject of tropospheric propagation of the very high radio frequencies has received considerable attention, but very little work appears to have been done at other parts of the radio spectrum; generally, in fact, the effect is referred to as occurring 'over 30 Mc./s.'. This is no doubt largely due to the over-riding effect of ionospheric propagation on the lower frequencies. Recent tests, of a qualitative nature, which I have made, however, suggest that tropospheric effects should not be ignored, even on frequencies below 1,000 kc./s.