The paper presents measurements of the atmospheric radio noise (ARN) at 27 kc/s made between 1963 and 1966 at four unified European stations: Uppsala (60° N), Kühlungsborn (54° N) Prague‐Panská Ves (50.5° N) and Sofia (43° N). The results concern the daily and annual variations and the latitude dependence of the mean integrated field strength. The diurnal maximum‐level variations at Uppsala and Kühlungsborn are shown by an amplitude probability‐distribution function. Finally, the results are compared with the predictions of the ARN level made by the C.C.I.R.
The paper presents measurements of the atmospheric radio noise (ARN) at 27 kcjs made between 1963 and 1966 at four unified European stations: Uppsala (60" N), Kuhlungsborn (54' N) Prague-PanskB Ves (50.5' N) and Sofia (43" N). The results concern the daily and annual variations and the latitude dependence of the mean integrated field strength. The diurnal maximum-level variations at Uppsala and Kiihlungsborn are shown by an amplitude probability-distribution function. Finally, the results are compared with the predictions of the ARN level made by the C.C.I.R. 14 B. SCHANMG AND v. SCUKA Eav [dB above 1 pWm] on 27kcls LMT J F M A M J J A S O N D 30 -35
Ship-borne and land-station measurements of atmospheric radio noise (ARN) at 27 kHz in latitudes between GOON and 23'N during winter 1968/69 and 1970/71 are presented. The results concern the diurnal variations, the latitude dependence and the longitudinal distribution of the mean integrated field strength. The diurnal variations are explained by reference t o the prevailing meteorological and ionospheric conditions. Finallv. che results are comaared with the predictions of the ARN level made by the C.C.I. R.
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