Equatorial ionospheric zonal drift model and vertical drift statistics from UHF scintillation measurements in South America

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dc.contributor.authorSheehan, R. E.
dc.contributor.authorValladares, C. E.
dc.date.accessioned2018-07-13T15:00:42Z
dc.date.available2018-07-13T15:00:42Z
dc.date.issued2004-09
dc.description.abstractUHF scintillation measurements of zonal ionospheric drifts have been conducted at Ancon, Peru since 1994 using antennas spaced in the magnetic east-west direction to cross-correlate geo-synchronous satellite signals. An empirical model of average drift over a wide range of Kp and solar flux conditions was constructed from successive two-dimensional fits of drift vs. the parameters and day of year. The model exhibits the typical local time trend of maximum eastward velocity in the early evening with a gradual decrease and reversal in the early morning hours. As expected, velocities at all hours increase with the solar flux and decrease with Kp activity. It was also found that vertical drifts could contribute to the variability of drift measurements to the east of Ancon at a low elevation angle. The vertical drift at the ionospheric intersection to the east can be estimated when combined with nearly overhead observations at Ancon or a similar spaced-antenna site at Antofagasta, Chile. Comparisons on five days with nearly simultaneous measurements of vertical drift by the Julia radar at Jicamarca, Peru show varying agreement with the spaced-antenna estimates. Statistical results from 1997 to 2001 generally agree with radar and satellite studies.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationSheehan, R. E., & Valladares, C. E. (2004). Equatorial ionospheric zonal drift model and vertical drift statistics from UHF scintillation measurements in South America.==$Annales Geophysicae, 22$==(9), 3177–3193. https://doi.org/10.5194/angeo-22-3177-2004es_ES
dc.identifier.doihttps://doi.org/10.5194/angeo-22-3177-2004es_ES
dc.identifier.journalAnnales Geophysicaees_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/1825
dc.language.isoenges_ES
dc.publisherEuropean Geosciences Uniones_ES
dc.relation.ispartofurn:issn:0992-7689
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectIonospherees_ES
dc.subjectEquatorial ionspherees_ES
dc.subjectIonospheric irregularitieses_ES
dc.subjectModeling and forecastinges_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleEquatorial ionospheric zonal drift model and vertical drift statistics from UHF scintillation measurements in South Americaes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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