Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors

dc.creatorVenkatesh, Kavutarapu
dc.creatorFagundes, Paulo Roberto
dc.creatorPrasad, D. S. V. V. D.
dc.creatorDenardini, Clezio Marcos
dc.creatorAbreu, Alessandro José de
dc.creatorJesus, Rodolfo de
dc.creatorGende, Mauricio Alfredo
dc.date2015-10
dc.date2020-07-02T14:06:31Z
dc.date.accessioned2023-07-14T19:53:24Z
dc.date.available2023-07-14T19:53:24Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/99751
dc.identifierhttps://ri.conicet.gov.ar/11336/53421
dc.identifierhttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JA021307
dc.identifierissn:2169-9402
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7437084
dc.descriptionThe equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric <i>E</i> region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results in the formation of equatorial ionization anomaly (EIA), which in turn generates large electron density variabilities. Simultaneous study on the characteristics of EEJ and EIA is necessary to understand the role of EEJ on the EIA variabilities. This is helpful for the improved estimation of total electron content (TEC) and range delays required for satellite-based communication and navigation applications. Present study reports simultaneous variations of EEJ and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA. Magnetometer measurements during the low solar activity year 2004 are used to derive the EEJ values over the two different sectors. The characteristics of EIA are studied using two different chains of GPS receivers along the common meridian of 77E (India) and 45W (Brazil). The diurnal, seasonal, and day-to-day variations of EEJ and TEC are described simultaneously. Variations of EIA during different seasons are presented along with the variations of the EEJ in the two hemispheres. The role of EEJ variations on the characteristic features of the EIA such as the strength and temporal extent of the EIA crest has also been reported. Further, the time delay between the occurrences of the day maximum EEJ and the well-developed EIA is studied and corresponding results are presented in this paper.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.formatapplication/pdf
dc.format9117-9131
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectAstronomía
dc.subjectFísica
dc.subjectElectron density variability
dc.subjectEquatorial and low-latitude ionosphere
dc.subjectEquatorial electrojet (EEJ)
dc.subjectEquatorial ionization anomaly (EIA)
dc.titleDay-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
dc.typeArticulo
dc.typeArticulo


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