An Investigation of Turbulence and Intermittency in the High-Latitude Ionosphere: A Multi Case Study
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https://hdl.handle.net/10037/34082Dato
2024-06-03Type
Master thesisMastergradsoppgave
Forfatter
Tovås, SondreSammendrag
High-latitude electron density irregularities can affect technology such
as the Global Navigation Satellite Services (GNSS) by degrading radio
signals. These irregularities are not fully understood. In this work we
investigate turbulence and intermittency in varying regions of the high-
latitude ionosphere using the structure function, empirical flatness and
probability density function. Our aim is to investigate whether these
turbulence data analysis tools can reveal additional information about
the nature of these phenomenons in the selected regions. We apply these
methods on 16 Hz electron density Swarm data across the polar cap and
auroral regions in the northern hemisphere. We observed different slopes
at large and small scales for the structure function in the polar cap and
across the entire polar region. We also noticed a clear difference between
the results during days of high and low geomagnetic activity. However,
we could not observe any significant differences in the auroral region
using this method. Furthermore, the results obtained by measuring the
empirical flatness and probability density function remain inconclusive as
we did not notice any substantial differences in either region or across the
different geomagnetic levels. Our results suggest at least some different
scaling behaviour across the entire polar region and polar cap which is
affected by geomagnetic storms, but further investigation is required to
establish any additional details about turbulence and intermittency.
Forlag
UiT Norges arktiske universitetUiT The Arctic University of Norway
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