An experimental and theoretical study of the mean diurnal variation of O<sup>+</sup>, NO<sup>+</sup>, O<sub>2</sub><sup>+</sup>, and N<sub>2</sub><sup>+</sup> ions in the mid‐latitude <i>F</i><sub>1</sub> layer of the ionosphereD. G. Torr, D. W. Rusch, Marsha R. Torr et al.|Journal of Geophysical Research Atmospheres|1979Cited by 52
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Atomic nitrogen densities in the thermosphereD. G. Torr, R. F. Theis, Marsha R. Torr et al.|Geophysical Research Letters|1976Cited by 49
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