abstract_textpA new method to extract neutral composition (O, O-2, N-2), exospheric temperature Tex, vertical plasma drift, W, and the total solar Extreme Ultraviolet flux with lambda = 1050 angstrom from routine ionosonde bottom-side electron density, Ne(h), observations has been proposed. The method can be used around noontime hours for all months of the year at middle latitudes where the ionospheric F-layer is formed by solar Extreme Ultraviolet radiation. The uncertainty of the retrieved neutral gas density coincides with the announced Mean Relative Deviation +/-(10-15) of CHAMP/STAR neutral gas density observations. The method also provides statistically significant better results in a comparison with modern Mass-Spectrometer-Incoherent-Scatter, Jacchia-Bowman 2008, and Drag Temperature Model 2013 empirical models. The thermospheric parameters retrieved for the St. Patrick Day magnetic storm and two so-called Q-disturbance periods are given as an example of the method application. The retrieved neutral gas densities for the St. Patrick Day storm are compared to Swarm-B accelerometer observations. The proposed method may be considered as a useful tool for analyses of the state of the upper atmosphere under various geophysical conditions./p/abstract_text
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