32 publication(s) trouvée(s)
Article scientifique
Determinations of ionosphere and plasmasphere electron content for an African chain of GPS stations
Abstract. The confluence of recent instrumentation deployments in Africa with developments for the determination of plasmasphere electron content using Global …
Article scientifique
Errors in wind resource and energy yield assessments based on the Weibull distribution
Abstract. The methodology used in wind resource assessments often relies on modeling the wind-speed statistics using a Weibull distribution. In …
Article scientifique
Longitudinal variation of equatorial electrojet and the occurrence of its counter electrojet
Abstract. We examined the longitudinal variability of the equatorial electrojet (EEJ) and the occurrence of its counter electrojet (CEJ) using …
Article scientifique
Ionospheric response to magnetar flare: signature of SGR J1550–5418 on coherent ionospheric Doppler radar
Abstract. This paper presents observational evidence of frequent ionospheric perturbations caused by the magnetar flare of the source SGR J1550–5418, …
Article scientifique
New results on equatorial thermospheric winds and temperatures from Ethiopia, Africa
Abstract. Measurements of equatorial thermospheric winds, temperatures, and 630 nm relative intensities were obtained using an imaging Fabry–Perot interferometer (FPI), …
Article scientifique
MONITOR Ionospheric Network: two case studies on scintillation and electron content variability
Abstract. The ESA MONITOR network is composed of high-frequency-sampling global navigation satellite systems (GNSS) receivers deployed mainly at low and …
Article scientifique
Signature of ionospheric irregularities under different geophysical conditions on SBAS performance in the western African low-latitude region
Abstract. Rate of change of TEC (ROT) and its index (ROTI) are considered a good proxy to characterize the occurrence …
Article scientifique
Induction effects of geomagnetic disturbances in the geo-electric field variations at low latitudes
Abstract. In this study we examined the influences of geomagnetic activity on the Earth surface electric field variations at low …
Article scientifique
Climatology of thermospheric neutral winds over Oukaïmeden Observatory in Morocco
Abstract. In order to explore coupling between the thermosphere and ionosphere and to address the lack of data relating to …
Article scientifique
Observations of equatorial ionization anomaly over Africa and Middle East during a year of deep minimum
Abstract. In this work, we investigated the veracity of an ion continuity equation in controlling equatorial ionization anomaly (EIA) morphology …
Article scientifique
Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24
Abstract. Small-scale ionospheric disturbances may cause severe radio scintillations of signals transmitted from global navigation satellite systems (GNSSs). Consequently, small-scale …
Article scientifique
Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil
Abstract. This paper presents 23 years (1992–2014) of quasi-continuous measurements of the total ozone column (TOC) over the Southern Space …
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