Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 38, issue 3
Articles | Volume 38, issue 3
https://doi.org/10.5194/angeo-38-789-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-38-789-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 3
Regular paper
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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.
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Special issue
Satellite observations for space weather and geo-hazard