Radio-Observations of the Ionosphere

Morphology of quantified ionospheric range spread-F over a wide range of midlatitudes in the Australian longitudinal sector

“…is a relatively new feature in the spread-F morphology. Rawer and Suchy (1967) found a similar distribution of midlatitude spread-F on the global scale. They found a boundary between low and high midlatitude spread-F occurrence.…”

“…The existence of a distinct minimum in the midlatitude spread-F is a relatively new aspect in this study hitherto reported only by Rawer and Suchy (1967) and indirectly from the results obtained by Preddey (1969) from a scintillation study. It creates a clear midlatitude ionospheric boundary between sub-auroral and low midlatitudes.…”

A Relativistic Treatment of Space-Time Rays and the Doppler Effect in General Media

“…Equation (1) may be solved by the method of characteristics, the characteristics being space-time rays. The ray or Hamilton equations then take the compact form (Synge 1954;Poeverlein 1962;Rawer and Suchy 1967) …”

“…for fixed X B is the dispersion relation for the existence of plane waves proportional to exp(iK.X) (9) in a medium having everywhere the properties of the actual medium at X B (Synge 1954;Whitham 1961;Poeverlein 1962;Lewis 1965;Rawer and Suchy 1967). This leads to the familiar interpretation…”

“…The approximate solution behaves locally like a plane wave, and the local wave number and frequency are appropriate local derivatives of the phase function S (Synge 1954;Whitham 1961;Poeverlein 1962;Lewis 1965;Rawer and Suchy 1967). Now it is well known that in a homogeneous medium (one in which the medium's properties do not depend upon position or time) there exist plane wave solutions with a phase function that is invariant with respect to Lorentz transformation.…”