
%0 Journal Article
%A McGilvray, JP 
%T The Reflection Coefficient of the Night-time Ionospheric F Region
%J Australian Journal of Physics
%D 1963/06/01
%V 16
%N 2
%P 203-215
%K 
%R https://doi.org/10.1071/PH630203
%U https://www.publish.csiro.au/paper/PH630203 
%X Night-time records of Fa reflections at normal incidence have been made at three frequencies, 2·28, 3·84, and 5·8 Mcls, using a swept-gain technique. The reflection coefficient of the F region has been measured from these records. The reflection coefficient is appreciably lees than unity at all frequencies for a large part of the recording period. Resolved trace measurements show the absorption to occur in the deviative region. There is some suggestion of the reflection coefficient, measured at 2·28 and 3; 84 Mcls, depending on season, monthly K" sum, and true height of reflection. The reflection coefficient measured at 5·8 Mcls appears to be independent of these parameters. There is 8 suggestion that the reflection coefficient is related directly to i.E, for K indices=5, and inversely to the operating frequency. 
