Physics
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47..653b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 47, July 1985, p. 653-662. Research supported by the Radio
Physics
4
E Region, F Region, Ionospheric Electron Density, Ionospheric Propagation, Radio Waves, Traveling Ionospheric Disturbances, Bandpass Filters, Gravity Waves, Night, Specific Heat, Spectrum Analysis
Scientific paper
A fixed frequency amplitude modulated transmission was reflected from the ionosphere and changes in the group path, phase path, signal amplitude and directions of arrival of this transmission caused by travelling ionospheric disturbances were measured. These measurements enabled approximate determinations of the horizontal wavelength, period and horizontal phase velocity of the disturbances, which were compared with the theory of disturbances for atmospheric waves. A simple model is proposed to explain the phase relationships between the TIDs observed in the group and phase paths, and the faster decrease in power of the phase path than the other measured parameters indicated by spectral analysis.
Baulch N. E. R.
Butcher E. C.
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