Browsing Research Articles by Author "Andima, Geoffrey"
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Characterization of the Low Latitude Plasma Density Irregularities Observed using C/NOFS and SCINDA Data.
Andima, Geoffrey; Amabayo, Emirant B; Jurua, Edward; Cilliers, Pierre J (Advances in Space Research, 2017-08-04)Abstract Complex electrodynamic processes over the low latitude region often result in post sunset plasma density irregularities which degrade satellite communication and navigation. In order to forecast the density ... -
GPS derived amplitude scintillation proxy model: A case over a low latitude station in East Africa
Andima, Geoffrey; Amabayo, Emirant B.; Jurua, Edward; Cilliers, Pierre J. (Journal of Atmospheric and Solar–Terrestrial Physics, 2020-10)Ionospheric scintillation is quite a common phenomenon over the low latitude regions and in East Africa it is often monitored using measurements from the SCIntillation Network Decision Aid (SCINDA) receivers. The SCINDA ... -
Mapping of the Ionospheric Total Electron Content over the East African Low–Latitude Region
Cele, Geoffrey; Andima, Geoffrey; Habyarimana, Valence; Jurua, Edward (Advances in Space Research, 2023)Ionospheric behaviour is often monitored using total electron content (TEC) measurements from Global Navigation Satellite System (GNSS) receivers. However, the GNSS receivers are sparse over the East African low-latitude ... -
Modeling of GPS total electron content over the African low-latitude region using empirical orthogonal functions
Andima, Geoffrey; Amabayo, Emirant B.; Jurua, Edward; Cilliers, Pierre J. (Annales Geophysicae Copernicus, 2019-01)In this paper, an empirical total electron content (TEC) model and trends in the TEC over the African low-latitude region are presented. GPS-derived TEC data from Malindi, Kenya (geographic coordinates 40.194_ E, 2.996_ ... -
Statistical analysis of TEC perturbations over a low latitude region during 2009–2013 ascending solar activity phase
Andima, Geoffrey; Jurua, Edward; Amabayo, Emirant Bertillas; Habarulema, John Bosco (Advances in Space Research, 2015)Total Electron Content (TEC) perturbations are manifestations of ionospheric irregularities which induce fluctuations in the amplitude and phase of trans-ionospheric radio signals. TEC data derived from Global Positioning ... -
Validation of the Atmospheric Boundary Layer Height Estimated from the MODIS Atmospheric Profile Data at an Equatorial Site
Onyango, Silver; Anguma, Simon K; Andima, Geoffrey; Parks, Beth (Atmosphere, 2020)The atmospheric boundary layer height is important for constraining air pollution and meteorological models. This study attempted to validate the MODIS-estimated atmospheric boundary layer height (ABLH), and variation in ...