Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F

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dc.contributor.authorHickey, Dustin A.
dc.contributor.authorMartinis, Carlos R.
dc.contributor.authorRodrigues, Fabiano S.
dc.contributor.authorVarney, Roger H.
dc.contributor.authorMilla, Marco
dc.contributor.authorNicolls, Michael J.
dc.contributor.authorStrømme, Anja
dc.contributor.authorArratia, Juan F.
dc.date.accessioned2018-06-28T15:21:02Z
dc.date.available2018-06-28T15:21:02Z
dc.date.issued2015-11-20
dc.description.abstractIn 2014 an all-sky imager (ASI) and an Advanced Modular Incoherent Scatter Radar consisting of 14 panels (AMISR-14) system were installed at the Jicamarca Radio Observatory. The ASI measures airglow depletions associated with large-scale equatorial spread F irregularities (10's-100's km), while AMISR-14 detects small-scale irregularities (0.34 m). This study presents simultaneous observations of equatorial spread F (ESF) irregularities at 10-100 km scales using the all sky-imager, at 3 m scales using the JULIA (Jicamarca Unattended Long-term Investigations of the Ionosphere and Atmosphere) radar, and at 0.34 m scales using the AMISR-14 radar. We compare data from the three instruments on the night of 20-21 August, 2014 by locating the radar scattering volume in the optical images. During this night no topside plumes were observed, and we only compare with bottomside ESF. AMISR-14 had five beams perpendicular to the magnetic field covering ~200 km in the east-west direction at 250 km altitude. Comparing the radar data with zenith ASI measurements, we found that most of the echoes occur on the western wall of the depletions with fewer echoes observed the eastern wall and center, contrary to previous comparisons of topside plumes that showed most of the echoes in the center of depleted regions. We attribute these differences to the occurrence of irregularities produced at sub-meter scales by the lower-hybrid-drift instability. Comparisons of the ASI observations with JULIA images show similar results to those found in the AMISR-14 and ASI comparison.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationHickey, D. A., Martinis, C. R., Rodrigues, F. S., Varney, R. H., Milla, M., Nicolls, M. J., ... Arratia, J. F. (2015). Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F.==$Journal of Geophysical Research: Space physics, 120$==(12), 10,883-10,896. https://doi.org/10.1002/2015JA021991es_ES
dc.identifier.doihttps://doi.org/10.1002/2015JA021991es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Space Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/1573
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9380
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectIonospherees_ES
dc.subjectIrregularitieses_ES
dc.subjectESFes_ES
dc.subjectRadares_ES
dc.subjectImaginges_ES
dc.subjectDepletiones_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleConcurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread Fes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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