Modeling the daytime, equatorial ionospheric ion densities associated with the observed, four-cell longitude patterns in E x B drift velocities

Modeling the daytime, equatorial ionospheric ion densities associated with the observed, four-cell longitude patterns in E x B drift velocities

Eduardo A. Araujo-Pradere,1,2 Tzu-Wei Fang,1,2 David N. Anderson,1,2 Mariangel Fedrizzi,1,2 and Russell Stoneback3

1Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, USA. 2Space Weather Prediction Center, NOAA, Boulder, Colorado, USA. 3Center for Space Sciences, University of Texas at Dallas, Richardson, Texas, USA.

RADIO SCIENCE, VOL. 47, RS0L12, doi:10.1029/2011RS004930, 2012

Correspondence to:

Eduardo A. Araujo-Pradere,
Esta dirección electrónica esta protegida contra spam bots. Necesita activar JavaScript para visualizarla


Abstract:

Previous studies have quantified the longitude gradients in E x B drift associated with the four-cell tidal structures and have confirmed that these sharp gradients exist on a day-to-day basis. For this paper, we incorporate the Ion Velocity Meter (IVM) sensor on the Communications/Navigation Outage Forecasting System satellite to obtain the daytime, vertical E x B drift velocities at the magnetic equator as a function of longitude, local time, and season and to theoretically calculate the F region ion densities as a function of altitude, latitude, longitude, and local time using the Global Ionosphere Plasmasphere model. We compare calculated ion densities assuming no longitude gradients in E x B drift velocities with calculated ion densities incorporating the IVM-observed E x B drift at the boundaries of the four-cell tidal structures in the Peruvian and the Atlantic longitude sectors. Incorporating the IVM-observed E x B drift velocities, the ion density crests rapidly converge to the magnetic equator between 285 and 300°E geographic longitude, are absent between 300° and 305°, and move away from the magnetic equator between 305° and 340°. In essence, the steeper the longitude gradient in E x B drifts, the steeper the longitude gradient in the equatorial anomaly crest location.

*click here to read this paper.


Primer Taller de Trabajo Low-Latitude Ionospheric Sensor Network



El taller tiene la finalidad de instruir a científicos, ingenieros y estudiantes de América del Sur en como emplear receptores de GPS y magnetómetros, para diagnosticar el estado y variabilidad de la ionósfera de bajas latitudes, e instruir en el procedimiento de como instalar y operar el estado...




» Magnetómetro LISN en Argentina

» LISN en la búsqueda de formar un observatorio distribuido
Acerca de LISN      |      Equipos      |      Información técnica y científica      |      Estaciones      |      Datos      |      Miscelánea      |      Descargas      |      Contacto
Copyright © 2017 Low-latitude Ionospheric Sensor Network    |    Radio Observatorio de Jicamarca     |     Instituto Geofísico del Perú