Rocket and radar investigation of background electrodynamics and bottom-type scattering layers at the onset of equatorial spread F

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dc.contributor.authorHysell, D. L.
dc.contributor.authorLarsen, M. F.
dc.contributor.authorSwenson, C. M.
dc.contributor.authorBarjatya, A.
dc.contributor.authorWheeler, T. F.
dc.contributor.authorBullett, T. W.
dc.contributor.authorSarango, M. F.
dc.contributor.authorWoodman Pollitt, Ronald Francisco
dc.contributor.authorChau Chong Shing, Jorge Luis
dc.contributor.authorSponseller, D.
dc.date.accessioned2018-07-16T18:19:08Z
dc.date.available2018-07-16T18:19:08Z
dc.date.issued2006-07
dc.description.abstractSounding rocket experiments were conducted during the NASA EQUIS II campaign on Kwajalein Atoll designed to elucidate the electrodynamics and layer structure of the postsunset equatorial F region ionosphere prior to the onset of equatorial spread F (ESF). Experiments took place on 7 and 15 August 2004, each comprised of the launch of an instrumented and two chemical release sounding rockets. The instrumented rockets measured plasma number density, vector electric fields, and other parameters to an apogee of about 450 km. The chemical release rockets deployed trails of trimethyl aluminum (TMA) which yielded wind profile measurements. The Altair radar was used to monitor coherent and incoherent scatter in UHF and VHF bands. Electron density profiles were also measured with rocket beacons and an ionosonde. Strong plasma shear flow was evident in both experiments. Bottom-type scattering layers were observed mainly in the valley region, below the shear nodes, in westward-drifting plasma strata. The layers were likely produced by wind-driven interchange instabilities as proposed by Kudeki and Bhattacharyya (1999). In both experiments, the layers were patchy and distributed periodically in space. Their horizontal structure was similar to that of the large-scale plasma depletions that formed later at higher altitude during ESF conditions. We argue that the bottom-type layers were modulated by the same large-scale waves that seeded the ESF. A scenario where the large-scale waves were themselves produced by collisional shear instabilities is described.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationHysell, D. L., Larsen, M. F., Swenson, C. M., Barjatya, A., Wheeler, T. F., Bullett, T. W., ... Sponseller, D. (2006). Rocket and radar investigation of background electrodynamics and bottom-type scattering layers at the onset of equatorial spread F.==$Annales Geophysicae, 24$==(5), 1387-1400. https://doi.org/10.5194/angeo-24-1387-2006es_ES
dc.identifier.doihttps://doi.org/10.5194/angeo-24-1387-2006es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalAnnales Geophysicaees_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/1906
dc.language.isoenges_ES
dc.publisherEuropean Geosciences Union (EGU)es_ES
dc.relation.ispartofurn:issn:0992-7689
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectIonospherees_ES
dc.subjectEquatorial ionospherees_ES
dc.subjectPlasma waves and instabilitieses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleRocket and radar investigation of background electrodynamics and bottom-type scattering layers at the onset of equatorial spread Fes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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