Transverse scatter meteor radar observations and full wave scattering modeling of polarization...
Автор: International Meteor Organization
Загружено: 2023-09-06
Просмотров: 90
Описание:
Transverse scatter meteor radar observations and full wave scattering modeling of polarization effects and trail evolution for various collision frequencies
Gunter Stober, Robert Weryk, Diego Janches, Erin Dawkins, Florian G ¨unzkofer, J.D. Carrillo-Sanchez, J.L. Hormaechea, Florian G ¨unzkofer, Dimitry Pokhotelov
Transverse scatter meteor radars have become a standard tool to observe the meteor Earth’s environment. Meteoroids entering the Earth’s atmosphere are decelerated and heated by collisions with atmospheric atoms and molecules and those with sufficient kinetic energy start to ablate and form an ambipolar diffusing plasma trail that is detectable by these radars. In this study, we present full wave scatter simulations and observations from the SAAMER-OS meteor radar in Southern Argentina and the Canadian Meteor Orbit Radar (CMOR) to analyze quantitatively the electron line density, initial trail radius, and ambipolar diffusion coefficient. Furthermore, we demonstrate the impact of altitude-dependent collision frequencies and the corresponding polarization effects. We can show that polarization measurements are equivalent to the triplefrequency measurements obtained from CMOR. We performed also a comparison to the classical theory for underdense meteors from Kaiser and Closs 1953.
http://imc2023.imo.net/program
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