Equatorial Spread F structures and associated airglow intensity variations observed over Gadanki [PDF]
Annales Geophysicae, 2008 Co-ordinated campaigns have been conducted from Gadanki (13.5° N, 79.2° E, dip lat 6.4° N) by operating simultaneously the Indian MST radar in ionospheric coherent backscatter mode and by monitoring thermosphere airglow line emissions ...
R. Sekar +3 more
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Atmosphere, 2022 In this paper, for the first time, simultaneous atmospheric temperature perturbation profiles obtained from the TIMED/SABER satellite and equatorial ion density and vertical plasma drift velocity observations with and without ESF activity obtained from ...
Melessew Nigussie +2 more
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Collisional Rayleigh-Taylor instability and shear-flow in equatorial Spread-F plasma [PDF]
Annales Geophysicae, 2003 Collisional Rayleigh-Taylor (RT) instability is considered in the bottom side of the equatorial F-region. By a novel nonmodal calculation it is shown that for an applied shear flow in equilibrium, the growth of the instability is considerably ...
N. Chakrabarti, G. S. Lakhina
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Simultaneous observations of equatorial F-region plasma depletions over Brazil during the Spread-F Experiment (SpreadFEx) [PDF]
Annales Geophysicae, 2009 From September to November 2005, the NASA Living with a Star program supported the Spread-F Experiment campaign (SpreadFEx) in Brazil to study the effects of convectively generated gravity waves on the ionosphere and their role in seeding Rayleigh ...
P.-D. Pautet +6 more
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Progress in Earth and Planetary Science, 2017 Equatorial plasma bubbles (EPBs) have been a longstanding and increasingly important subject because they cause severe scintillations in radio waves from Global Navigation Satellite System satellites.
Tatsuhiro Yokoyama
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Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere [PDF]
Annales Geophysicae, 2018 Equatorial plasma bubble/spread F irregularity occurrence can present large variability depending upon the intensity of the evening prereversal enhancement in the zonal electric field (PRE), that is, the F region vertical plasma drift, which basically
M. A. Abdu +6 more
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A Reduced Dimensional Emulator for Forecasting Equatorial Spread F
Space WeatherA machine learning emulator has been developed to efficiently reproduce electron densities from a three‐dimensional, data‐driven, regional simulation of postsunset ionospheric irregularities associated with equatorial spread F (ESF).
A. Kirchman, D. L. Hysell, S. Palacios
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Phase calibration approaches for radar interferometry and imaging configurations: equatorial spread F results [PDF]
Annales Geophysicae, 2008 In recent years, more and more radar systems with multiple-receiver antennas are being used to study the atmospheric and ionospheric irregularities with either interferometric and/or imaging configurations. In such systems, one of the major challenges
J. L. Chau +3 more
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High-resolution coherent backscatter interferometric radar images of equatorial spread F using Capon's method [PDF]
Annales Geophysicae, 2017 We present results of Capon's method for estimation of in-beam images of ionospheric scattering structures observed by a small, low-power coherent backscatter interferometer. The radar interferometer operated in the equatorial site of São Luís, Brazil
F. S. Rodrigues +2 more
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Relationships between pre-sunset electrojet strength, pre-reversal enhancement and equatorial spread-F onset [PDF]
Annales Geophysicae, 2010 The virtual height of the bottom side F-region (h'F) and equatorial spread-F (ESF) onsets at Chumphon (10.7° N, 99.4° E; 3.3° N magnetic latitude) were compared with the behaviour of equatorial electrojet (EEJ) ground strength at Phuket ...
J. Uemoto +4 more
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