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Difference spectrum fitting of the ion-neutral collision frequency from dual-frequency EISCAT measurements

Günzkofer, Florian Ludwig and Stober, Gunter and Pokhotelov, Dimitry and Miyoshi, Yasunobu and Borries, Claudia (2023) Difference spectrum fitting of the ion-neutral collision frequency from dual-frequency EISCAT measurements. Atmospheric Measurement Techniques (AMT). Copernicus Publications. doi: 10.5194/amt-16-5897-2023. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/16/5897/2023/


The plasma-neutral coupling in the mesosphere-lower thermosphere strongly depends on the ion-neutral collision frequency across that region. Most commonly, the collision frequency profile is calculated from the climatologies of atmospheric models. However, previous measurements indicated that the collision frequency can deviate notably from the climatological average. Direct measurement of the ion-neutral collision frequency with multifrequency incoherent scatter radar (ISR) measurements has been discussed before, though actual measurements have been rare. The previously applied multifrequency analysis method requires a special simultaneous fit of the two incoherent scatter spectra, which is not possible with standard ISR analysis software. The difference spectrum method allows us to infer ion-neutral collision frequency profiles from multifrequency ISR measurements based on standard incoherent scatter analysis software, such as the Grand Unified Incoherent Scatter Design and Analysis Package (GUISDAP) software. In this work, we present the first results by applying the difference spectrum method. Ion-neutral collision frequency profiles obtained from several multifrequency EISCAT ISR campaigns are presented. The profiles obtained with the difference spectrum method are compared to previous collision frequency measurements, both from multifrequency ISR and other measurements, as well as results from empirical and comprehensive atmosphere models. Ion-neutral collision frequency measurements can be applied to improve first-principle ionospheric models

Item URL in elib:https://elib.dlr.de/200790/
Document Type:Article
Title:Difference spectrum fitting of the ion-neutral collision frequency from dual-frequency EISCAT measurements
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Günzkofer, Florian LudwigUNSPECIFIEDhttps://orcid.org/0000-0001-6568-2995UNSPECIFIED
Stober, GunterInstitute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Bern, Switzerlandhttps://orcid.org/0000-0002-7909-6345UNSPECIFIED
Pokhotelov, DimitryUNSPECIFIEDhttps://orcid.org/0000-0002-3712-0597UNSPECIFIED
Miyoshi, YasunobuKyushu University, Fukuoka, JapanUNSPECIFIEDUNSPECIFIED
Borries, ClaudiaUNSPECIFIEDhttps://orcid.org/0000-0001-9948-3353UNSPECIFIED
Date:December 2023
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Copernicus Publications
Keywords:Ion-neutral collision frequency Incoherent Scatter Radar EISCAT
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:15 Dec 2023 08:28
Last Modified:08 Jan 2024 14:08

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