NDLI: Spectral interpretation of radio-sounder-stimulated magnetospheric plasma resonances in terms of kappa distributions

Content Provider	IEEE Xplore Digital Library
Author	Benson, R.F. Vinas, A.F. Fainberg, J. Osherovich, V.A. Purser, C.M. Galkin, I.A. Reinisch, B.W.
Copyright Year	2011
Description	Author affiliation: University of Massachusetts, Lowell, MA 01854 USA (Galkin, I.A.; Reinisch, B.W.) \|\| Catholic University of America/Goddard Space Flight Center, Geospace Physics Laboratory (Code 673), Greenbelt, MD 20771 USA (Osherovich, V.A.) \|\| University of Maryland Baltimore County/Goddard Earth and Science Technology Center/ Goddard Space Flight Center, Geospace Physics Laboratory (Code 673), Greenbelt, MD 20771 USA (Purser, C.M.) \|\| NASA/Goddard Space Flight Center, Geospace Physics Laboratory (Code 673), Greenbelt, MD 20771 USA (Benson, R.F.; Vinas, A.F.; Fainberg, J.)
Abstract	Ionospheric topside sounders stimulate a wide variety of signal returns, which have been labeled plasma resonances, including two sequences that appear between the harmonics of the electron cyclotron frequency fce. One, known as the Qn sequence, occurs above the upper-hybrid frequency fuh, where $f^{2}$ = $f^{2}$ + $f^{2}$ and fpe is the electron plasma frequency; this sequence has been attributed to slowly-propagating electrostatic Bernstein-mode waves [1, 2]. Similar resonances are stimulated by magnetospheric radio sounders. In this case, however, it is often necessary to introduce a non-Maxwellian electron-velocity distribution function into the dispersion equation used to calculate the Qn frequencies to obtain agreement with observations [3]. Interpretations based on bi-Maxwellian [3] and kappa [4] distributions have been proposed. Here we expand on the latter, which requires fewer free parameters, by comparing parametric curves of kappa-derived Qn frequencies with observations from the Radio Plasma Imager (RPI) on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) satellite. The calculated Qn frequencies based on a Maxwellian distribution are higher than those based on a kappa distribution and the differences have been found to approach 20% of the ambient fce value [4]. Applying this radio spectrometry to IMAGE/RPI plasmagrams, after accurate fpe/fce determinations have been obtained, enables the determination of electron-velocity-distribution function information pertaining to the ambient magnetospheric plasma. Such accurate fpe/fce determinations can best be made when a sounder generated wave cutoff can be determined in addition to identifying and determining the frequencies of sounder-stimulated plasma resonances. We will demonstrate this procedure using IMAGE/RPI data.
Starting Page	1
Ending Page	1
File Size	176499
Page Count	1
File Format	PDF
ISBN	9781424451173
e-ISBN	9781424460519
DOI	10.1109/URSIGASS.2011.6051107
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-13
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Economic indicators Magnetic resonance imaging Resonant frequency Plasmas Magnetosphere Electrostatics Physics
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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