Latitude Variations of Frequency of Occurrence of "Spread-F" Satellite Traces

Abstract

Night-time "spread-F" satellites, revealed as discrete extra traces of range greater than the main F-region echo on ionograms (h'f records) have been recorded by McNicol, Webster, and Bowman (1956)? as part of the spread-F phenomenon at Brisbane. This report is an investigation of the relative frequency of occurrence of such satellites at different latitudes.