Doppler frequency shift of a radio signal in a medium of slight horizontal inhomogeneity
Abstract
An expression is derived for the Doppler shift of a radio signal in a medium in which the longitudinal gradient of the refractive index is much smaller than the vertical gradient. The general formulas are reduced to integrals of the ray trajectory in a horizontally homogeneous ionosphere. For illustration, a linear ionospheric layer with a variable vertical density gradient and a variable lower bound of the ionosphere is analyzed.
- Publication:
-
Geomagnetism and Aeronomy
- Pub Date:
- October 1979
- Bibcode:
- 1979Ge&Ae..19..824B
- Keywords:
-
- Doppler Effect;
- Frequency Shift;
- Ionospheric Propagation;
- Radio Signals;
- Inhomogeneity;
- Integral Equations;
- Ionospheric Electron Density;
- Ray Tracing;
- Refractivity