Results 11 to 20 of about 501,910 (164)

The afternoon counter-electrojet current system along the 75°E meridian during the IEEY

Earth, Planets and Space, 2017
In the present study, the technique of principal component analysis (PCA) is applied to analyze the hourly mean values of geomagnetic field components D, H, and Z along an Indo-Russian chain of stations during the International Equatorial Electrojet Year
S. K. Bhardwaj, P. B. V. Subba Rao
doaj   +2 more sources

LONGITUDINAL EXTENT OF COUNTER ELECTROJET EVENTS

Brazilian Journal of Geophysics, 2018
Para solicitação de resumo, entrar em contato com editor-chefe (editor@sbgf.org.br). 
V. Somayajulu, L. Cherian
semanticscholar   +2 more sources

Characterizations of the diurnal shapes of OI 630.0 nm dayglow intensity variations: inferences [PDF]

Annales Geophysicae, 2002
Measurements of OI 630.0 nm thermospheric dayglow emission by means of the Dayglow Photometer (DGP) at Mt. Abu (24.6° N, 73.7° E, dip lat 19.09° N), a station under the crest of Equatorial Ionization Anomaly (EIA), reveal day-to-day changes in the ...
D. Chakrabarty, D. Chakrabarty, R. Sekar, H. Chandra, R. Narayanan, B. M. Pathan, K. S. V. Subbarao   +6 more
doaj   +5 more sources

The Quiet-Time Equatorial Electrojet and Counter-Electrojet

Journal of geomagnetism and geoelectricity, 1979
Using ground magnetometer data from several stations near the dip equator, the magnetically quiet-time characteristics of the daytime normal electrojet and the morning and afternoon counter-electrojets are established and illustrated. In particular, the solar cycle, seasonal, longitudinal and day-to-day variations of counter-electrojets as well as ...
R. Marriott, A. Richmond, S. Venkateswaran   +2 more
semanticscholar   +3 more sources

Counter electrojet features in the Brazilian sector: simultaneous observation by radar, digital sounder and magnetometers [PDF]

Annales Geophysicae, 2009
In the present work we show new results regarding equatorial counter electrojet (CEJ) events in the Brazilian sector, based on the RESCO radar, two set of fluxgate magnetometer systems and a digital sounder.
C. M. Denardini, M. A. Abdu, H. C. Aveiro, L. C. A. Resende, P. D. S. C. Almeida, Ê. P. A. Olívio, J. H. A. Sobral, C. M. Wrasse   +7 more
doaj   +2 more sources

The equatorial counter-electrojet—a review of its geomagnetic aspects [PDF]

Journal of Atmospheric and Terrestrial Physics, 1977
Abstract The disappearance of Esq type traces from ionograms at the magnetic equator during magnetically quiet periods is related to inverted latitudinal profiles of the regular daily magnetic SR variation (in its horizontal and vertical components).
P. Mayaud
semanticscholar   +4 more sources

The equatorial ionospheric response over Tirunelveli to the 15 January 2010 annular solar eclipse: observations [PDF]

Annales Geophysicae, 2012
In this paper we present a case study of the annular solar eclipse effects on the ionization of E and F regions of equatorial ionosphere over Tirunelveli [77.8° E, 8.7° N, dip 0.4° N] by means of digital ionosonde on 15 January 2010.
C. K. Nayak, D. Tiwari, D. Tiwari, K. Emperumal, A. Bhattacharyya   +4 more
doaj   +3 more sources

Formation and identification of counter electrojet (CEJ)

International Journal of Physical Sciences, 2013
This study investigates the possible occurrence of counter equatorial electrojet (CEJ) and a quicker method for identification of CEJ. Data from a chain of magnetic observatories of World Data Center for Geomagnetism in Tokyo, Japan, was employed.
N. Francisca, A. Esther, C. Eucharia, B. Isikwue, J. U. Oby   +4 more
semanticscholar   +3 more sources

Global dynamo simulation of ionospheric currents and their connection with the equatorial electrojet and counter electrojet : a case study [PDF]

Journal of Geophysical Research: Space Physics, 1983
International audienceThe interrelationship of equatorial and planetary scale ionospheric horizontal currents on quiet days is studied by means of a global ionospheric wind dynamo simulation.
Blanc, Michel, Crochet, Michel, Hanuise, Christian, Mazaudier, Christine, Vila, Paul   +4 more
core   +4 more sources

Equatorial Ionospheric VTEC Perturbations During the 21 June 2020 Solar Eclipse

Earth and Space Science
The annular solar eclipse of 21 June 2020, provided a valuable opportunity to examine the ionospheric response to celestial events. This study analyzes variations in Vertical Total electron content (VTEC) over the equatorial region using data from the ...
Atirsaw Muluye Tilahun, Asebe Oljira, Melessew Nigussie, Sujan Prasad Gautam, Yohannes Getachew Ejigu   +4 more
doaj   +2 more sources