This article has an erratum: [https://doi.org/10.1051/swsc/2022013]
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The diurnal variation of the background electron density bNe in the polar cap region for the Northern (top) and Southern (bottom) hemispheres during high (left) and low (right) solar activity levels. Additional plots present distribution with such values on a logarithmic scale. The colour bar shows the density of counts in the same scale for all plots. The Y-axis limit based on Figure SM1.
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