47
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244
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Astronomie
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Astrophysique
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Publications
47 publication(s) trouvée(s)
Article scientifique
Investigation of the relationship between the spatial gradient of total electron content (TEC) between two nearby stations and the occurrence of ionospheric irregularities
Abstract. The relation between the occurrence of ionospheric irregularities and the spatial gradient of total electron content (TEC) derived from …
Article scientifique
Estimating satellite and receiver differential code bias using a relative Global Positioning System network
Abstract. Precise total electron content (TEC) is required to produce accurate spatial and temporal resolution of global ionosphere maps (GIMs). …
Article scientifique
Artificial intelligence and the question of being
Technology is part of all life forms. This does not mean that all technology is beneficial for life. Technological evolution …
Article scientifique
On the Triggering Mechanisms of Upward Lightning
Upward lightning studies took place in Rapid City, South Dakota, USA and S. Paulo, Brazil during the summer thunderstorm seasons …
Article scientifique
Investigation of Effects of Coronal Mass Ejections on Ionospheric Total Electron Content over Nsukka, South Eastern Nigeria
Abstract. In this work, we attempted to investigate the contributions and effects of coronal mass ejections (CMEs) on total electron …
Article scientifique
Solar-eclipse-induced perturbations at mid-latitude during the 21 August 2017 event
Abstract. A study of the response of some ionospheric parameters and their relationship in describing the behaviour of ionospheric mechanisms …
Article scientifique
Static conformal models for anisotropic charged fluids
We investigate the role played by conformal symmetries in the study of exact solutions in static spherically symmetric spacetimes. We …
Article scientifique
A Giant Water Maser Flare in the Galactic Source IRAS 18316-0602
The results of long-term monitoring of the Galactic maser source IRAS 18316–0602 (G25.65+1.05) in the water-vapor line at frequency f …
Article scientifique
Modeling of GPS total electron content over the African low-latitude region using empirical orthogonal functions
Abstract. In this paper, an empirical total electron content (TEC) model and trends in the TEC over the African low-latitude …
Article scientifique
Pulsation in Intermediate-Mass Stars
A new perspective of pulsation in stars within the δ Scuti instability strip has recently emerged as a result of …
Article scientifique
Padé approximation for time-domain plane wave reflected from a lossy earth
To deal with the behaviour of wire structures subjected to electromagnetic waves with the finite-difference time-domain (FDTD) method, it is …
Article scientifique
Evaluation of the NeQuick model performance under different geomagnetic conditions over South Africa during the ascending phase of the solar cycle (2009–2012)
Abstract. In order to provide a scientific base to the NeQuick characterisation under disturbed conditions, the comparison of its performance …
Article scientifique
Variation in total electron content with sunspot number during the ascending and maximum phases of solar cycle 24 at Birnin Kebbi
Abstract. Satellite radio signals are affected by the presence of electrons in the earth’s upper atmosphere (ionosphere). The more electrons …
Article scientifique
Ionospheric and thermospheric response to the 27–28 February 2014 geomagnetic storm over north Africa
Abstract. The present work explores the ionospheric and thermospheric responses to the 27–28 February 2014 geomagnetic storm. For the first …
Article scientifique
Variability of TEC and improvement of performance of the IRI model over Ethiopia during the high solar activity phase
Abstract. This paper discusses the monthly and seasonal variation of the total electron content (TEC) and the improvement of performance …
Article scientifique
Survey of conditions for artificial aurora experiments by the second electron gyro-harmonic at EISCAT Tromsø using dynasonde data
We report a brief survey of matching conditions for artificial aurora optical experiments utilizing the second electron gyro-harmonic (2.7-MHz frequency) …
Article scientifique
Statistical analysis of the correlation between the equatorial electrojet and the occurrence of the equatorial ionisation anomaly over the East African sector
Abstract. This study presents statistical quantification of the correlation between the equatorial electrojet (EEJ) and the occurrence of the equatorial …
Article scientifique
New results on the mid-latitude midnight temperature maximum
Abstract. Fabry–Perot interferometer (FPI) measurements of thermospheric temperatures and winds show the detection and successful determination of the latitudinal distribution …
Article scientifique
Survey of conditions for artificial aurora experiments at EISCAT Tromsø using dynasonde data
We report a brief survey on conditions for artificial aurora optical experiments in F region heating with O-mode at the …
Article scientifique
Comparison of lightning activity in the two most active areas of the Congo Basin
Abstract. A comparison of the lightning activity in the two most active areas (Area_max for the main maximum and Area_sec …
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