Physics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jatp...42.1009s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 42, Nov.-Dec. 1980, p. 1009-1023. Research supported by the Science Resear
Physics
14
Error Analysis, Ionospheric Propagation, Radio Direction Finders, Very Low Frequencies, Whistlers, Azimuth, Bearing (Direction), Goniometers, Multipath Transmission
Scientific paper
The magnitudes of systematic errors in the determination of the azimuthal bearings of whistler ducts by three types of direction finders are investigated as function of ionospheric and ground parameters. An earth-ionosphere waveguide model which incorporates an ionospheric refractive index given by the full Appleton-Hartree formula is employed to calculate the variation of the errors of the 4 parameter A and B methods and the cross-loop goniometer with ionospheric electron density, latitude and direction of propagation. The variation of systematic error with ground conductivity and propagation distance is also considered for a range of wave frequencies. Calculations reveal a strong variation of the error with ionospheric electron density and the altitude of reflection from the ionosphere, suggesting that a large diurnal variation should be observed in the azimuthal bearing error
Rycroft Michael J.
Strangeways H. J.
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