Accession Number : AD0283084

Title :   SPORADIC-E IONIZATION OBSERVED BY THE BACKSCATTER TECHNIQUE

Corporate Author : CENTRO RADIOELETTRICO SPERIMENTALE G MARCONI (ITALY)

Personal Author(s) : DOMINICI,P.

Report Date : 15 FEB 1962

Pagination or Media Count : 1

Abstract : Results of ionospheric sounding by ground backscatter carried out to deter ine the occurrence of propagation via sporadic-E ionization is discusse The seasonal and iur l occurre ce, as well as the azimut al distribution of the Es echo s are discussed. T ere was a good correlation between the time occurrence of Es echoesAND THE OCCURRENCE OF Es ionization, the top frequency of which exceeds a critical value related to the frequency of the sounding radio waves. To account for a lack of correlation between the azimuthal distribution of t e echoes and th azi ut al di ribution of foEs, it is suggested that the latter one depends even on an azimuthal variation of he vertical radiation diagram of the antenna, due to some characteristics of the ground. Statistical analysis of Es clouds was perform d from May to July 1961; about 60% of t e observed clouds were moving clouds, their m in movement occurring to ard the southwest. The mean dimension of t ese clouds was about 250 km. (Author)

Descriptors :   *ATMOSPHERIC SOUNDING, EARTH, HIGH FREQUENCY, PERIODIC VARIATIONS, RADIO WAVES, SCATTERING, STATISTICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE