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1. Identity statement
Reference TypeConference Paper (Conference Proceedings)
Sitemtc-m21c.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP3W34R/3QTFD42
Repositorysid.inpe.br/mtc-m21c/2018/04.16.12.27
Metadata Repositorysid.inpe.br/mtc-m21c/2018/04.16.12.27.30
Metadata Last Update2020:12.07.21.11.27 (UTC) administrator
Secondary KeyINPE--PRE/
Citation KeyRodriguesPaulMill:2018:RaImEq
TitleRadar imaging equatorial spread F events
Year2018
Access Date2024, June 15
Secondary TypePRE CI
2. Context
Author1 Rodrigues, Fabiano S.
2 Paula, Eurico Rodrigues de
3 Milla, M. A.
Resume Identifier1
2 8JMKD3MGP5W/3C9JH2U
Group1
2 DIDAE-CGCEA-INPE-MCTIC-GOV-BR
Affiliation1 The University of Texas at Dallas
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Jicamarca Radio Observatory
Author e-Mail Address1 fabiano@utdallas.edu
2 eurico.paula@inpe.br
Conference NameLatin American Conference on Space Geophysics, 11 (COLAGE)
Conference LocationBuenos Aires, Argentina
Date16-20 abr.
History (UTC)2018-04-16 12:27:45 :: simone -> administrator :: 2018
2018-04-18 05:03:00 :: administrator -> administrator] :: 2018
2018-04-18 05:03:00 :: administrator] -> administrator :: 2018
2020-12-07 21:11:27 :: administrator -> simone :: 2018
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
AbstractEquatorial spread F (ESF) is the name given to signatures of ionospheric electron density irregularities observed by different types of ground- and space-based sensors. ESF irregularities have a wide spectrum of horizontal and vertical scale sizes, ranging from hundreds of km down to cm. Large-scale ESF structures are believed to be produced by the so-called ionospheric Generalized Rayleigh-Taylor (GRT) instability. This instability finds favorable conditions around sunset hours, near the magnetic equator when large vertical density gradients and enhanced upward plasma drifts are known to occur. Therefore, it explains the high occurrence of ESF irregularities in the post-sunset hours, and during periods when a pre-reversal enhancement of the upward ExB plasma drifts occur. Most of the main features of ESF, including its seasonal and longitudinal variability have been well studied and reported. Recent efforts have focused on advancing our understanding of the conditions leading to the short-term (day-to-day) variability in ESF. We also seek a better understanding, for instance, of unusual ESF events occurring outside typical ESF periods. Those include quiet-time events observed in the post-midnight sector, daytime, and during June solstice. Advances in numerical modeling of ESF have allowed us to better understand thermospheric and ionospheric conditions leading to ESF development and suppression. To keep up with numerical developments, new techniques and data sources need to be put in place to confirm theories and projections. New radar measurements and techniques can provide insights with that respect. In this presentation, we will talk about two-dimensional views of ESF events using observations made by relatively small radar systems. In the first part of the talk, we will present results of interferometric in-beam interferometric coherent scatter radar observations made in the Brazilian sector using a small, low-power radar system. In the second part of the talk, we will then present new coherent scatter observations of ESF events using measurements made by a 14-panel version of the AMISR system at the Jicamarca Radio Observatory in Peru. While the interferometric measurements provide high resolution observations of ESF scattering structures, they are limited in field-of-view. We show that the limitation in field-of-view can be overcome with AMISR-14 phased-array observations at the expense of zonal resolution. We will present and discuss results of both types of observations in light of current ESF theories and modeling.
AreaCEA
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4. Conditions of access and use
Languageen
User Groupsimone
Visibilityshown
Update Permissionnot transferred
5. Allied materials
Next Higher Units8JMKD3MGPCW/3ETL868
Citing Item List 2
Host Collectionurlib.net/www/2017/11.22.19.04
6. Notes
Empty Fieldsarchivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readergroup readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume
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