Spaced Observations of Radio Noise from the Outer Atmosphere

Abstract

IT has recently been suggested¹ that during some types of radio noise storms generated in the Earth's outer atmosphere the source of the noise may remain almost constant in position in Right Ascension. If this were so, it would be expected that the arrival of the storm would be recorded at almost the same local time at places of different longitude, rather than simultaneously. To test this idea and more generally to investigate the extent to which observations of the noise are correlated at different places, recordings have been made during June and July 1959, at Camden N.S.W. (Latitude 34°03′S Longitude 150°42′E) and Adelaide (Latitude 34°56′S Longitude 138°53′E). The geomagnetic latitudes are 42°S and 45°S respectively. The noise level in a frequency band 1 kc./s. wide centred at 4.5 kc./s. was recorded using conventional techniques.