Physics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56..631b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 56, no. 5, p. 631-636
Physics
2
Atmospheric Models, High Frequencies, Ionograms, Wave Propagation, Geomagnetism, Magnetic Fields, Ray Tracing
Scientific paper
On oblique ionograms, the maximum frequencies of the ordinary and extraordinary modes are referred to as nose frequencies. The difference in the nose frequencies depends on parameters such as the length of the propagation circuit and the direction of propagation. In this paper, the difference in nose frequencies is studied using the frequency scaling technique of Bennett et al. (1991). For long paths, an explicit formula is obtained which gives the difference approximately as a function of the local magnetic dip and azimuth of propagation at the ray mid point. For shorter paths, it is shown how analytic ray tracing can be used to determine the difference.
Bennett Anthony. J.
Chen Jiahua
Dyson Peter L.
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