Comparison between nighttime ionosonde, incoherent scatter radar, AE‐E satellite, and HF Doppler observations of F region vertical electrodynamic plasma drifts in the vicinity of the magnetic equator

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dc.contributor.authorOyekola, Oyedemi S.
dc.date.accessioned2018-10-26T14:55:52Z
dc.date.available2018-10-26T14:55:52Z
dc.date.issued2006-11-23
dc.description.abstractNighttime F region vertical drifts were made using an ionosonde for the equatorial station Ibadan (7.4°N, 3.9°E, 6°S dip) from 1 year of data during 1957–1958 International Geophysical Year (IGY) that corresponds to a period of solar maximum for undisturbed condition. We compare the seasonal vertical drifts with measurements made by incoherent scatter radar, AE‐E satellite, and HF Doppler for equatorial F region vertical drifts. We find a comparable variability pattern during periods of high F layer heights during equinox and the December solstice, and the opposite behavior occurs during June solstice. The drifts are predominantly downward between 2000 and 0500 LT intervals. Ionosonde drifts are smaller in values by either a factor of two or three than other methods, except for consistent June solstice ionosonde and satellite magnitudes. The equinoctial average prereversal enhancements measured by the four techniques are roughly comparable (about 36 m/s) and occur at the same local time (1900 LT) for all the seasons. The evening reversal times are similar, apart from June solstice that exhibits large variations. The morning reversal times are also in accord except for the equinoctial Jicamarca drift. Our observations indicate that ionosonde drifts measurements are in better agreement with vertical drifts results at other equatorial stations.es_ES
dc.description.peer-reviewPor pareses_ES
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dc.identifier.citationOyekola, O. S. (2006). Comparison between nighttime ionosonde, incoherent scatter radar, AE‐E satellite, and HF Doppler observations of F region vertical electrodynamic plasma drifts in the vicinity of the magnetic equator.==$Journal of Geophysical Research: Space Physics, 111$==(A11), A11318. https://doi.org/10.1029/2006JA011844es_ES
dc.identifier.doihttps://doi.org/10.1029/2006JA011844es_ES
dc.identifier.journalJournal of Geophysical Research: Space Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3168
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9380
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectEquatorial ionospherees_ES
dc.subjectIonospheric variabilityes_ES
dc.subjectMeasurement techniqueses_ES
dc.subjectNighttime F regiones_ES
dc.subjectPlasma driftses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleComparison between nighttime ionosonde, incoherent scatter radar, AE‐E satellite, and HF Doppler observations of F region vertical electrodynamic plasma drifts in the vicinity of the magnetic equatores_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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