Effects of solar eclipse on the ionosphere observed by the Doppler sounding

0474627 - ÚFA 2018 DE eng A - Abstract
Šindelářová, Tereza - Mošna, Zbyšek - Chum, Jaroslav
Effects of solar eclipse on the ionosphere observed by the Doppler sounding.
Geophysical Research Abstracts. Göttingen: European Geosciences Union, 2017. EGU2017-4819. ISSN 1607-7962.
[EGU General Assembly 2017. 23.04.2017-28.04.2017, Vienna]
Institutional support: RVO:68378289
Keywords : ionosphere * continuous Doppler sounding * gravity waves * infrasound * solar eclipse
Subject RIV: DG - Athmosphere Sciences, Meteorology
http://meetingorganizer.copernicus.org/EGU2017/EGU2017-4819.pdf

The Doppler sounding of the ionosphere is based on measurements of the frequency shift between the transmitted
and received radio wave of a stable known frequency. The frequency shift is related to changes of the phase path
of the radio wave and can be influenced by the vertical motion of the reflecting layer due to gravity waves, by
compression and rarefaction of gas at a fixed height owing to infrasound waves or by changes of electron density
due to changes of ionization rate e.g. during the solar eclipse or solar flares.
We studied effects of total solar eclipses on 20 March 2015 in the Czech Republic and on 9 March 2016 on
Taiwan. In both events, the Doppler sounding was located in the area of partial eclipse. Distinct disturbance
was observed around the time of the maximum eclipse. We assume that it is related to processes at the site of
measurements rather than to waves propagating from the region of total eclipse.
Permanent Link: http://hdl.handle.net/11104/0271639