Electron content measurements of equatorial anomalous ionosphere using the geostationary satellite signals |
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| Authors: | ND Kaushika |
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| Institution: | Institute de Pesquisas Espaciais (INPE), São José dos Campos, SP, Brazil |
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| Abstract: | Measurements of electron content (NT) near the crest of the equatorial ionosphere anomaly in South America have been made and analysed to investigate NT variations with solar hour, solar rotation and geomagnetic storms. The annual mean of diurnal ratio, defined as the ratio of the maximum to the minimum electron content of the day is found to be 5.0. Anomalous increases in night time electron content are observed with maxima around 2100 LMT and 2300 LMT during summer and equinoctial months. These increases are found to be linked with vertical motion of the F-layer. Spatial resonance in equatorial F-layer plasma appears to be the possible cause of these increases. |
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