Abstract
A steady-state theoretical model is used to obtain variations of the H+/O+ and He+/O+ density ratios in the upper ionosphere at middle latitudes. The model results are compared with the existing data from satellite measurements. Analytical functions are constructed approximating the latitude and altitude variations of these ratios.
Keywords
mathematical modelling;light-ion density;improving empirical models
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DOI: https://doi.org/10.4401/ag-4043
Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X