Propagation of dipole waves through the anisotropic ionosphere in equatorial regions
Article first published online: 7 DEC 2012
Copyright 1992 by the American Geophysical Union.
Volume 27, Issue 5, pages 733–742, September-October 1992
How to Cite
1992), Propagation of dipole waves through the anisotropic ionosphere in equatorial regions, Radio Sci., 27(5), 733–742, doi:10.1029/92RS00924., , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 18 FEB 1992
- Manuscript Received: 3 JUL 1991
The Earth's magnetic field influences electromagnetic waves passing through the ionosphere. Dipole fields emitted from satellites above equatorial regions generate ground signals of different strength, depending on whether the waves propagate in east-west or west-east direction. This effect is investigated analytically within a plane three-layer model consisting of the near-Earth space, a homogeneous ionosphere, and the atmosphere. The obtained quotient of the “east-west” and “west-east” ground field strengths increases with increasing electron density of the ionosphere and decreases with increasing collision frequency of the electrons. Beyond that, this quotient shows an interesting frequency dependence caused by the anisotropy and the waveguide effect of the ionosphere. It could be proved that the gained results are also valid for short-term fluctuations of the ionosphere.