An analysis of the solar-activity effects in the upper atmosphere

Details An analysis of the solar-activity effects in the upper atmosphere An analysis of the solar-activity effects in the upper atmosphere

Nov 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21.1835j&link_type=abstract

Planetary and Space Science, Volume 21, Issue 11, p. 1835-1842.

Computer Science

6

Scientific paper

A study of the upper-atmosphere variations induced by solar activity was made by using 29,574 densities derived from the drag of 10 satellites in the interval 1958-1971. In a comparison of the respective merits of the Ca II-plage index and the 10.7 cm solar flux to represent the erratic (`27 day') component of the variation, the latter is shown to give invariably better results. The ratio ΔT/δF of the temperature variations to the variations of the decimetric flux is shown to vary considerably with solar activity, but little with height or with local solar time. The time lag of the atmospheric variations behind those of the decimetric flux varies from a minimum of 0.9 day at noon to 1.6 days at midnight.

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