Buscar
Mostrando ítems 1-10 de 367
Disturbances at F2-region heights of equatorial anomaly during geomagnetic storms
(Elsevier, 2003-12)
Neutral gas composition and ionospheric measurements taken by the Dynamic Explorer 2 satellite at F2-region heights during two geomagnetic storms are used to analyze the role of some possible physical mechanisms responsible ...
Some ionospheric storm effects at equatorial and low latitudes
(Elsevier, 2014-04)
In this paper, the response of the equatorial and low latitude ionosphere to three intense geomagnetic storms occurred in 2002 and 2003 is reported. For that, critical frequency of F2-layer foF2 and the peak height hmF2 ...
Some ionospheric storm effects at equatorial and low latitudes
(Elsevier, 2014-03-04)
In this paper, the response of the equatorial and low latitude ionosphere to three intense geomagnetic storms occurred in 2002 and 2003 is reported. For that, critical frequency of F2-layer foF2 and the peak height hmF2 ...
Impact of sudden stratospheric warmings on equatorial ionization anomaly
(American Geophysical Union, 2010-10-07)
We investigate the ionospheric response to several stratospheric sudden warming events which occurred in Northern Hemisphere winters of 2008 and 2009 during solar minimum conditions. We use GPS total electron content data ...
Estimating the daytime Equatorial Ionization Anomaly strength from electric field proxies
(American Geophysical Union, 2008-09-10)
The Equatorial Ionization Anomaly (EIA) is a significant feature of the low‐latitude ionosphere. During daytime, the eastward electric field drives a vertical plasma fountain at the magnetic equator creating the EIA. Since ...
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
(Blackwell Publishing Ltd, 2015-10)
The equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric E region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results ...
Diagnostics of equatorial and low latitude ionosphere by TEC mapping over Brazil
(Elsevier B.V., 2014-08-01)
The total electron content (TEC) in the equatorial and low-latitude ionosphere over Brazil was monitored in two dimensions by using 2011 data from the ground-based global navigation satellite system (GNSS) receiver network ...
CIGALA: Challenging the solar maximum in Brazil with PolaRxS
(2011-12-01)
The upcoming solar maximum, which is expected to reach its peak around May 2013, occurs at a time when our reliance on high-precision GNSS has reached unprecedented proportions. The perturbations of the ionosphere caused ...