Accession Number : AD0282199

Title :   STUDIES OF HF- AND VHF-AURORAL ZONE PROPAGATION.

Descriptive Note : Final rept.,

Corporate Author : KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN)

Personal Author(s) : Liszka,Ludwik

Report Date : 01 MAR 1962

Pagination or Media Count : 23

Abstract : Results obtained with the help of a radioastronomical swept-frequency interferometer are discussed. A special slow scintillation of the radio-source Cassiopeia has been observed. This seems to result from the focusing effect of single, large-size ionospheric regions. An investigation of the correlation of their occurrence and properties with other geophysical parameters has also been made. A discussion of the methods of Doppler- and signal strength measurements of satellite transmissions is included. Results of observations of Sputnik III, for which the largest amount of observational material has been obtained, are discussed. The 'dropout' phenomenon, and its connection with other geophysical phenomena, has been studied in detail. Faraday-fading and amplitude-scintillations have been studied in connection with magnetic activity, spread-F and sporadic-E. Diurnal and seasonal variations of the occurrence-frequency of the Faraday-fading and amplitude-scintillations have also been investigated. Measurements of the frequency of Faraday-fading have been used for calculations of local electron densities and total electron amount. Some 'on-board' measurements, for example corpuscular radiation intensity measurements of Explorer VII, have also been recorded. (Author)

Descriptors :   (*SATELLITE VEHICLES), (*RADIO TRANSMISSION), (*AURORAE), HIGH FREQUENCY, VERY HIGH FREQUENCY, RADIO ASTRONOMY, SCINTILLATION COUNTERS, INTERFEROMETERS, DIURNAL VARIATIONS, DOPPLER TRACKING, IONOSPHERIC DISTURBANCES, RADIO SIGNALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE