Ionospheric boundary conditions of hydromagnetic waves - The dependence on azimuthal wavenumber and a case study

Details Ionospheric boundary conditions of hydromagnetic waves - The dependence on azimuthal wavenumber and a case study Ionospheric boundary conditions of hydromagnetic waves - The dependence on azimuthal wavenumber and a case study

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38.1315y&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, Oct. 1990, p. 1315-1325.

Computer Science

23

Backscattering, Boundary Conditions, Earth Ionosphere, Geomagnetic Micropulsations, Magnetohydrodynamic Waves, Coherent Radar, Electric Fields, Kelvin-Helmholtz Instability, Radar Tracking, Statistical Analysis

Scientific paper

A statistical study investigating PC5 pulsation ionospheric boundary conditions is reported. The study utilizes data from the Sweden And Britain Radar-auroral Experiment (SABRE) VHF coherent auroral radar. The ratio of the pulsation radar backscatter intensity modulations to the ionospheric irregularity drift velocity modulations is calculated. This enables the pulsation ionospheric electric field boundary condition to be established, allowing the wave mode in the radar field of view to be determined. Three compressional pulsations with similar characteristics are examined in more detail, and a full case study, which includes data from an extensive ground magnetometer array, as well as the Scandinavian Twin Auroral Radar Experiment (STARE), is conducted on one of these pulsations. The ionospheric electric field boundary condition reveals the pulsation bo be a fast mode wave in the SABRE and STARE fields of view. These Pc5 pulsation observations are discussed in terms of recent global mode modeling.

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