Results 11 to 20 of about 118,766 (238)

Imaging of the equatorial ionosphere [PDF]

open access: yesAnnals of Geophysics, 2005
The equatorial anomaly is the dominant structure in free electron concentration in the tropical ionosphere. Due to its edges (crests) which are characterised by steep latitudinal gradients in TEC and are temporally and spatially variable, it is
C. N. Mitchell, M. Materassi
doaj   +11 more sources

Equatorial anomaly in the Jovian ionosphere

open access: yesGeophysical Research Letters, 1981
The electron concentration data from Pioneer 10 and 11 and Voyager 1 and 2 indicate the presence of equatorial anomaly in the Jovian ionosphere, with the peak electron concentration value showing a minimum near the equator.
Mahajan, K. K., K. K. Mahajan
openaire   +2 more sources

Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly [PDF]

open access: yesAnnales Geophysicae, 2011
Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two large-scale processes in the equatorial/low latitude ionosphere, driven primarily by the eastward electric field during daytime.
L. Jose   +4 more
doaj   +5 more sources

Storm-time meridional flows: a comparison of CINDI observations and model results [PDF]

open access: yesAnnales Geophysicae, 2014
During a large geomagnetic storm, the electric field from the polar ionosphere can expand far enough to affect the mid-latitude and equatorial electric fields.
M. Hairston   +3 more
doaj   +4 more sources

GNSS Ionosphere Sounding of Equatorial Plasma Bubbles [PDF]

open access: yesAtmosphere, 2019
Ground- and space-based Global Navigation Satellite System (GNSS) receivers can provide three-dimensional (3D) information about the occurrence of equatorial plasma bubbles (EPBs).
Guanyi Ma   +5 more
doaj   +3 more sources

Letter to the editor: Electric field fluctuations (25-35 min) in the midnight dip equatorial ionosphere [PDF]

open access: yesAnnales Geophysicae, 2000
Measurements with a HF Doppler sounder at Kodaikanal (10.2°N, 77.5°E, geomagnetic latitude 0.8°N) showed conspicuous quasi-periodic fluctuations (period 25-35 min) in F region vertical plasma drift, Vz in the interval 0047-0210 IST on the night of 23 ...
J. Hanumath Sastri   +14 more
doaj   +2 more sources

Ionospheric Perturbation: A Review of Equatorial Plasma Bubble in the Ionosphere

open access: yes2019 6th International Conference on Space Science and Communication (IconSpace), 2019
Ionospheric irregularities including the Equatorial Plasma Bubbles (EPB), equatorial anomaly, equatorial electrojet and Travelling Ionospheric Disturbances (TID). This paper reviews the irregularities in the ionosphere focused on the EPB. EPB has drawn great interest due to the severe effects of the communications and satellite-based navigation system.
M.H. Mokhtar   +3 more
openaire   +2 more sources

Measurements and simulation of ionospheric scattering on VHF and UHF radar signals : coherence times, coherence bandwidths and S4 [PDF]

open access: yes, 2009
Irregularities in the electron density of the ionosphere cause phase and amplitude scintillation on transionospheric VHF and UHF radar signals, particularly at lower radio frequencies.
Cannon, Paul   +2 more
core   +4 more sources

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

open access: yesAnnales 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   +6 more
doaj   +1 more source

Letter to the Editor: SCIPION, a new flexible ionospheric sounder in Senegal [PDF]

open access: yesAnnales Geophysicae, 1998
SCIPION is a new state of the art digital sounder that has been devoloped by France Telecom-CNET for ionospheric monitoring and research. Extensive data processing using DSP technology has resulted in a low power, low cost and full featured system for
Y. M. Le Roux   +3 more
doaj   +1 more source

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