night-time f-region and daytime e-region ionospheric drifts measured at udaipur during solar flares

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ID: 245195
2002
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Abstract
Ionospheric drifts measured at a low latitude station, Udaipur (Geomag. Lat. 14.5° N), in the night-time F-region and daytime E-region during solar flares have been studied. The night-time observations, which correspond to the F-region drifts, were carried out on five different nights. The daytime observation corresponding to the E-region drifts is only for one day. It is found that the apparent drift during the solar flare period is reduced considerably, in the daytime E-region as well as in the night-time F-region. The East-West and North-South components of the apparent drift speed are also similarly affected. For the daytime E-region drifts during a flare, increased ionization and subsequent reduction of reflection height is proposed to be the cause of reduced drift speeds. For the night-time F-region drifts, a reduced electric field at the F-region heights resulting from coupling of sunlit and dark hemispheres has been proposed to be the possible cause.

Key words. Ionosphere (electric fields and currents; ionospheric disturbances)
Reference Key
vyas2002annalesnight-time Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;B. M. Vyas;B. M. Vyas;R. Pandey
Journal journal of food measurement and characterization
Year 2002
DOI
10.5194/angeo-20-1837-2002
URL
https://www.ann-geophys.net/20/1837/2002/angeo-20-1837-2002.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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