Geophysical investigations by scattered radio waves
Article first published online: 7 DEC 2012
Copyright 1975 by the American Geophysical Union.
Volume 10, Issue 7, pages 681–691, July 1975
How to Cite
1975), Geophysical investigations by scattered radio waves, Radio Sci., 10(7), 681–691, doi:10.1029/RS010i007p00681.(
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 9 APR 1975
The application of scattered radio waves to geophysical investigations is reviewed. The occurrence of ground scatter depends on the smoothness of the reflecting layer and limits for the inhomogeneity may be given. Direct backscatter occurs from field-aligned irregularities in the auroral belt and movements may be derived from Doppler shift. The location and temporal movement of the two predominant precipitation belts are observed. Meteor scatter is strongly aspect sensitive and is used for deriving physical properties of the meteorites. The analysis of scattering in transequatorial short wave propagation points to a gravity wave induced system of eastward travelling field-aligned inhomogeneities. Incoherent scatter has proved a successful tool for investigating many important parameters of the ionosphere. Satellite scintillations are helpful in mapping the irregularities of the electron content. They may be used for determining the height of the irregularities by radio wave holography. Scattering of microwaves on the ground is becoming a useful tool for geoexploration. Scattering processes in the troposphere are dealt with in a paper by C. G. Little in this issue.