Accession Number:

AD0440205

Title:

GYRO-SPLITTING IN THE IONOSPHERE,

Descriptive Note:

Corporate Author:

UNIVERSITY OF NEW ENGLAND ARMIDALE (AUSTRALIA)

Report Date:

1963-05-15

Pagination or Media Count:

13.0

Abstract:

Observations on the gyrofrequency splitting of the extraordinary mode of the radio wave have been made at Armidale lat. 30 degrees 32 minutes S and long. 151 degrees 38 minutes E using a Cossor ionosonde and a high gain array of 40 dipoles. The sensitivity of the receiving system is high and echoes with reflection coefficient as low as 7 nepers have been recorded. A model night time nh profile is derived from the observed hf curves. The group refractive indices and the absorption coefficients have been computed from the magneto-ionic theory and used to calculate the group retardation and absorption suffered by the X-mode of the radio wave near the gyrofrequency for the model nh profile. These are compared with the observed hf curves and the agreement seems to be good. It is concluded that the simple theory of Appleton, Farmer and Ratcliffe 1938 explains satisfactorily the results of observations of group retardation and absorption of the X-mode reflections below the gyrofrequency. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE