
%0 Journal Article
%A Bennett, JA 
%T The Ray Theory of Doppler Frequency Shifts
%J Australian Journal of Physics
%D 1968/06/01
%V 21
%N 3
%P 259-272
%K 
%R https://doi.org/10.1071/PH680259
%U https://www.publish.csiro.au/paper/PH680259 
%X A general expression is obtained according to ray theory for the Doppler frequency shift observed when both receiver and transmitter are in motion in a time-varying anisotropic but lossless medium. The result is obtained using Hamilton's optical method. The range of application of the resulting expression and its relationship to a number of published results are considered. The method of analysis is also applied to the calculation of the group path of a radio wave. 
