NASA NTRS · 19680038788
Electron concentration profiles during sunspot maximum and minimum.
Abstract
Ionosphere electron concentration profiles during sunspot maximum and minimum, using DOVAP in 1958 and rocket-borne two frequency propagation in 1964
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Lootens, H. T., Prenatt, R. E.. 1968-02-01. Electron concentration profiles during sunspot maximum and minimum.. https://ntrs.nasa.gov/citations/19680038788
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