Accession Number : AD0728723

Title :   Trans-Equatorial Transmissions at Very High Frequency.

Descriptive Note : Annual rept. no. 3, 1 Sep 68-31 Aug 69,


Personal Author(s) : Carman,Eric H. ; Heeran,Margaret P. ; Anastassiadis,Michael A.

Report Date : JUL 1971

Pagination or Media Count : 238

Abstract : Data collected at Roma, Lesotho and near Pretoria, Republic of South Africa, from the 40 MHz Greek Police F.M system during the period September 1968 through August 1969 is recorded. Synoptic analysis of occurrence and signal strength of these transequatorial-F transmissions together with earlier data collected since March 1967 is presented. Path losses and path analysis for frequencies in the range 34-72 MHz are discussed in relation to the Athens-Roma TEF circuit in preparation for analysis of transmissions on 34, 45.1 and 72 MHz already in progress at the time of preparation of the present Report. The discussion includes proposals for investigation of the TEF path by ground based and satellite born ionosondes, together with optical (airglow) methods. (Author)

Descriptors :   (*Ionospheric propagation), Radio signals, Very high frequency, Diurnal variations, Radio reception, Frequency modulation, Attenuation, Sunspots, Electron density, Greece, South Africa, Equatorial regions

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE