Abstract: The 10.7-cm solar flux (S) is widely used for upper-atmosphere studies as an index of the solar extreme ultraviolet radiation (EUV), whose variations are responsible for major changes in properties above 200 km. A model ...

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Abstract: Current fallout-computation methods do not account for the early-time dynamics of the fallout process. Therefore, the present theory was originated in the attempt to explain the mechanics of fallout more completely. This ...

Abstract: A simple atmospheric density model, based on satellite orbital decay data from four satellites, is derived by assuming that a direct proportionality applies between the 10.7-cm solar-radio-noise flux and the density. The ...

Abstract: Eighteen hundred seventy-seven layers of turbulence, measured between 3000-18,300 m at four widely separated locations during all seasons by a parachuted telemetering instrument, have been analyzed by reducing the data to ...

Abstract: No Abstract Available.

Abstract: A semi-theoretical model of the upper atmosphere has been constructed to allow the calculation of neutral properties from 100 to 10,000 km as a function of local time and solar activity. The calculations are based on ...