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Polarization dependency of transverse scattering and collisional coupling to the ambient atmosphere from meteor trails - theory and observations

Stober, Gunter and Weryk, Robert and Janches, Diego and Dawkins, Erin C M and Günzkofer, Florian Ludwig and Hormaechea, Jose Luis and Pokhotelov, Dimitry (2023) Polarization dependency of transverse scattering and collisional coupling to the ambient atmosphere from meteor trails - theory and observations. Planetary and Space Science. Elsevier. doi: 10.1016/j.pss.2023.105768. ISSN 0032-0633.

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Abstract

Quantitative analyses of transverse scatter meteors to derive physically consistent solutions of the ambipolar diffusion coefficient, electron line density, and initial trail radius have been rare. In this manuscript, we present simulations using a full-wave scatter treatment of the transverse scatter meteor echo profiles for different background collision frequencies to account for the increase in ion-neutral and electron-neutral collisions over the typical specular meteor layer between 75-110 km. The altitude dependency of the ionneutral collision frequency was adapted from recent multi-frequency radar observations by the European Incoherent Scatter Scientific Association (EISCAT). We generate look-up tables with parallel and transverse reflection coefficients for various collision frequencies in order to investigate how this quantity alters the meteor echo profile observed at different altitudes. We analyze 33 specular meteor observations collected with the Southern Argentina Agile Meteor Radar Orbital System (SAAMER-OS). Typical detections provide information about the meteor trajectory, enabling computation of both scattering angles, as well as the determination of precise meteoroid velocities. However, with the addition of two recently installed antennas which receive each polarization direction separately, we were able to also determine the ambipolar diffusion coefficient, electron line density, and initial trail radius, by performing a qualitative fit to the collected data. Finally, we demonstrate that utilizing the polarization information of a given echo produces a similar result to that of the triple-frequency observations made using the Canadian Meteor Orbit Radar (CMOR).

Item URL in elib:https://elib.dlr.de/200523/
Document Type:Article
Title:Polarization dependency of transverse scattering and collisional coupling to the ambient atmosphere from meteor trails - theory and observations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Stober, GunterInstitute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Bern, Switzerlandhttps://orcid.org/0000-0002-7909-6345UNSPECIFIED
Weryk, RobertThe University of Western Ontario, CanadaUNSPECIFIEDUNSPECIFIED
Janches, DiegoITM Physics Laboratory,NASA/Goddard Space Flight Center, 8800 Greenbelt Roadhttps://orcid.org/0000-0001-8615-5166UNSPECIFIED
Dawkins, Erin C MCatholic University of America, NASA Goddard Space Flight CenterUNSPECIFIEDUNSPECIFIED
Günzkofer, Florian LudwigUNSPECIFIEDhttps://orcid.org/0000-0001-6568-2995UNSPECIFIED
Hormaechea, Jose LuisUniversidad Nacional de La Plata, ArgentinaUNSPECIFIEDUNSPECIFIED
Pokhotelov, DimitryUNSPECIFIEDhttps://orcid.org/0000-0002-3712-0597UNSPECIFIED
Date:September 2023
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1016/j.pss.2023.105768
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Meteors, Transverse scatter meteor radar, Polarization, Ambipolar Diffusion, Electron line density, Full-wave scattering model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Solar-Terrestrial coupling processes
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes
Deposited By: Günzkofer, Florian Ludwig
Deposited On:04 Jan 2024 13:29
Last Modified:04 Jan 2024 13:42

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