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dc.contributor.authorStoneback, Russell A.en_US
dc.contributor.authorHeelis, Roderick A.en_US
dc.description.abstractPrevious climatological investigations of ionospheric irregularity occurrence in the equatorial ionosphere have utilized in situ measurements of plasma density to identify the presence of an irregularity. Here we use the Morlet wavelet and C/NOFS to isolate perturbations in meridional ion drifts and generate irregularity occurrence maps as a function of local time, longitude, season, and solar activity. For the low solar activity levels in 2008, the distributions identified by velocity perturbations follow normalized density perturbation (Delta N/N) maps with large occurrences after midnight into dawn over all longitudes. The velocity and normalized density occurrence maps contract in both local time and longitude with increasing solar activity. By 2011 irregularities are confined to particular longitudes expected by alignment and a few hours of local time after sunset. The variation in the occurrence of the late night irregularities with solar activity is consistent with the presence of gravity wave seeding.en_US
dc.description.sponsorshipNASA grant NNX10AT02Gen_US
dc.publisherCopernicus Gesellschaft Mbhen_US
dc.rightsCC BY 3.0 (Attribution)en_US
dc.rights©2014 The Authorsen_US
dc.sourceAnnales Geophysicae
dc.subjectSolar activityen_US
dc.subjectIon driften_US
dc.titleIdentifying Equatorial Ionospheric Irregularities using In Situ Ion Driftsen_US
dc.identifier.bibliographicCitationStoneback, R. A., and R. A. Heelis. 2014. "Identifying equatorial ionospheric irregularities using in situ ion drifts." Annales Geophysicae 32(4), doi:10.5194/angeo-32-421-2014en_US
dc.contributor.ISNI0000 0000 3175 0999 (Heelis, RA)
dc.contributor.LCNA88021080‏ (Heelis, RA)

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