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Direction of ionospheric structures in LOFAR calibration data
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<pre>The Low Frequency Array (LOFAR) interferometer is a radio telescope
network that provides the radio astronomical observations with the highest
up-to-date sensitivity in the frequency regime between 10 and 240 MHz. As
these frequencies approach the ionospheric plasma frequency, ionospheric
perturbation of propagating electromagnetic signal is the main
environmental factor affecting the quality of observations. Removal of
ionospheric influence is a part of routinely conducted data calibration,
resulting in high sensitivity differential Total Electron Content (dTEC)
values between LOFAR stations.
In this study we present a method for medium scale ionospheric structures
detection applied to interferometric data obtained from calibration
solutions of one of the key LOFAR projects- the Epoch of Reionization.
Each observation spans 110-250 MHz of frequency range and lasts 6-8 hours
during winter nighttime. Due to operating frequency and sensitivity of
interferometric data, studies conducted with LOFAR can complement GNSS
research with medium scale structures.</pre>
Title: Direction of ionospheric structures in LOFAR calibration data
Description:
<pre>The Low Frequency Array (LOFAR) interferometer is a radio telescope
network that provides the radio astronomical observations with the highest
up-to-date sensitivity in the frequency regime between 10 and 240 MHz.
As
these frequencies approach the ionospheric plasma frequency, ionospheric
perturbation of propagating electromagnetic signal is the main
environmental factor affecting the quality of observations.
Removal of
ionospheric influence is a part of routinely conducted data calibration,
resulting in high sensitivity differential Total Electron Content (dTEC)
values between LOFAR stations.
In this study we present a method for medium scale ionospheric structures
detection applied to interferometric data obtained from calibration
solutions of one of the key LOFAR projects- the Epoch of Reionization.
Each observation spans 110-250 MHz of frequency range and lasts 6-8 hours
during winter nighttime.
Due to operating frequency and sensitivity of
interferometric data, studies conducted with LOFAR can complement GNSS
research with medium scale structures.
</pre>.
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