The Influence of the Solar Cycle on Global Sporadic E Parameters

0508482 - ÚFA 2020 DE eng A - Abstrakt
Arras, C. - Mošna, Zbyšek - Resende, L. C. A. - Wickert, J. - Kepkar, A.
The Influence of the Solar Cycle on Global Sporadic E Parameters.
IUGG 2019 Abstract Book. Potsdam: International Union of Geodesy and Geophysics, 2019. A03p-215.
[IUGG General Assembly /27./. 08.07.2019-18.07.2019, Montréal]
Institucionální podpora: RVO:68378289
Klíčová slova: atmosphere-ionosphere coupling * ionospheric sporadic E layer * solar cycle * ionosonde data
Obor OECD: Meteorology and atmospheric sciences
http://iugg2019montreal.com/abstract-book.html

GPS radio occultation measurements are used to observe the occurrence and the intensity of sporadic E
layers on a global scale. We analysed data acquired by the FORMOSAT-3/COSMIC satellites. Since their
launch in April 2006, the satellites collected about 6 million of globally distributed radio occultation profiles.

For our study, we use ionosonde data at midlatitude and low latitude stations as well as Signal-to-Noise Ratio
(SNR) GPS L1 radio occultation profiles. The SNR is sensitive to vertical changes in the electron density
which is reflected in large fluctuations in the according altitude range of the profile. Therefore, vertically thin
ionospheric phenomena like sporadic E layers can easily be identified using numerical filtering techniques.

Currently, the radio occultation time series comprises 12 years covering approximately one solar cycle. In this
study, we will focus on variations in sporadic E occurrence and intensity in line with the solar cycle. We will
show global results, which indicate significant differences between different latitudes. Generally, we observe
an indirect correlation between sporadic E and the solar cycle which is most clearly visible in the magnetic
equator region.

Trvalý link: http://hdl.handle.net/11104/0299377