Accession Number : AD0255961

Title :   OBSERVATIONS OF ELECTRON DENSITY AND COLLISION FREQUENCY IN THE D REGION DURING POLAR RADIO BLACKOUT CONDITIONS

Corporate Author : NORWEGIAN DEFENCE RESEARCH ESTABLISHMENT KJELLER

Personal Author(s) : HOLT,O. ; LANDMARK,B. ; LIED,F.

Report Date : SEP 1960

Pagination or Media Count : 1

Abstract : Some results are presented from observations of electron density and collision frequency in the D region during polar radio blackout condition. The observations, which consisted of measurements of ionospheric cross modulation and of partial reflections from the lower ionosphere, were carried out near Tromso, close to theAURORAL ZONE. Reliable results could be obtained for both types of observations in a number of cases, when the strength of the echoes observed on 2.7 mc was more than 60 db below the normal signal level, and when no echoes were observed on the recorder. (Author)

Descriptors :   *ELECTROMAGNETIC WAVE REFLECTIONS, *IONOSPHERIC DISTURBANCES, *IONOSPHERIC PROPAGATION, *RADIO TRANSMISSION, ABSORPTION, DENSITY, ELECTRONS, MEASUREMENT, MODULATION, PROPAGATION, RADIO WAVES, REFLECTION, SCATTERING

Distribution Statement : APPROVED FOR PUBLIC RELEASE