The F1 ledge: density, height and slope

B. W. Reinisch, X. Huang

Abstract


Diurnal variations of the F1 region ionization at 170 km altitude and the slope ?170 = dN/dh at this height are analyzed for mid-latitude and equatorial stations: Millstone Hill, Ramey, Puerto Madryn and Jicamarca. Both the density N(t) and the slope ?(t)at 170 km show well defined diurnal variations with day-to-day variabilities of less than 10%. The heights of the F1 ledge, hmF1, are spread over ± 20 km and are therefore of limited value for modeling purposes.

Keywords


Ionosphere;electron density profile;ionospheric modeling

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References


DOI: https://doi.org/10.4401/ag-4022
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X