Time-latitude diagram for the first series of observations. In the leftmost panel the total line radiance is shown in a logarithmic colour scale from yellow (lowest) to red (highest values). The next plot to the right shows the same diagram with the position of the quiet Sun C iv outliers superimposed. Finally, form left to right, the same time-latitude diagram with the colour code representing the first, second, third, and fourth order moments in a linear scale.
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