Full wave determination of oblique incidence reflection coefficients for model E(sub s) layers

Details Full wave determination of oblique incidence reflection coefficients for model E(sub s) layers Full wave determination of oblique incidence reflection coefficients for model E(sub s) layers

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56..377b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 56, no. 3, p. 377-390

Computer Science

Sound

1

Atmospheric Physics, Atmospheric Stratification, E Region, Geomagnetism, Incidence, Ionospheric Sounding, Ionospherics, Radio Transmission, Radio Waves, Wave Reflection, Wind Shear, Amplitudes, Approximation, Coefficients, Graphs (Charts), Ionosondes, Rocket Sounding

Scientific paper

Reflection and transmission coefficients for horizontally stratified E(sub s)-layers are numerically calculated using a full wave analysis. The analysis is general in terms of the permitted angles of incidence of the radio wave and the orientation of the geomagnetic field with respect to the wave. Concentration profiles of synthetic E(sub s)-layers used in the analysis are generated using wind shear theory. The analysis shows that partial reflections and transmissions can occur over a wide frequency range but only become of significant amplitude when the E(sub s)-layer's vertical width is less than about 400 m or when the concentration gradient is very steep due to the introduction of non-linear wind shears. Coupling between o and x modes can be very strong for oblique paths and is largely independent of the layer width. Under certain circumstances almost complete mode reversal upon reflection is predicted. This effect is very sensitive to the orientation of the geomagnetic field, H/approx., with respect to the wave normal, n, and approaches a maximum when the absolute value of n/approx. x H/approx approaches unity and becomes negligible when the absolute value of n/approx x H/approx approaches 0.

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