Ducted propagation of hydromagnetic waves in the upper ionosphere |
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Authors: | Manh Dung Duong B.J. Fraser |
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Affiliation: | aDepartment of Physics, University of Newcastle, New South Wales, Australia |
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Abstract: | This paper presents a theoretical investigation of the ducting of Pc1 hydromagnetic waves in an ionospheric layer situated above the F2 region. Theoretical calculations show that this upper ionospheric duct may also sustain horizontal propagation of Pc1 pulsations over appreciable distances. It is found that there is a low-frequency cutoff as in the case of the F2 layer waveguide. The group velocity of waves in the upper ionospheric duct is considerably greater, and dispersion is more pronounced compared to the ducted propagation in the F2 region. |
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