Abstract
This article studies long-period variations in the Earth’s upper atmosphere density over several solar activity cycles, using long-term data on the evolution of motion of three artificial satellites (Intercosmos-19, Meteor-1-2, and Cosmos-1154) in orbits at heights of 400–1000 km. The time interval when the satellites were in the orbits covered three solar activity cycles (partly the 21st, completely the 22nd, and partly the 23rd). It is found that the variations in the average density of the upper atmosphere at heights of 400–600 km in the 1980–2000 period were governed by the changes in the solar activity level.
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Original Russian Text © S.I. Boldyrev, G.S. Ivanov-Kholodny, O.P. Kolomiitsev, A.I. Osin, 2011, published in Geomagnetizm i Aeronomiya, 2011, Vol. 51, No. 4, pp. 552–555.
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Boldyrev, S.I., Ivanov-Kholodny, G.S., Kolomiitsev, O.P. et al. Influence of solar activity on variations in the density of the Earth’s upper atmosphere. Geomagn. Aeron. 51, 546–549 (2011). https://doi.org/10.1134/S0016793211030030
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DOI: https://doi.org/10.1134/S0016793211030030