Articles | Volume 38, issue 3
https://doi.org/10.5194/angeo-38-789-2020
https://doi.org/10.5194/angeo-38-789-2020
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30 Jun 2020
Regular paper | Highlight paper |  | 30 Jun 2020

Lower-thermosphere response to solar activity: an empirical-mode-decomposition analysis of GOCE 2009–2012 data

Alberto Bigazzi, Carlo Cauli, and Francesco Berrilli

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Short summary
Forecasting the thermosphere (atmosphere's uppermost layer from 90 to 800 km altitude) is crucial to space mission design, spacecraft operations and space surveillance. The thermosphere is controlled by the Sun through variable solar extreme-ultraviolet radiation and the solar wind. We show how the solar indices Mg II and Ap may be used in forecasting thermospheric density at 260 km, a very low altitude, where the GOCE satellite operated from 2009 to 2013, during the full rise of solar cycle 24.