Correlation coefficient maps. Panels (a)-(c): Correlation coefficient maps between time-slice plots of the degraded HRI_EUV time-slice image and the Ne VIII amplitude time-slice image at three positions. The color bar shows the range of correlation coefficients plotted on the left side. Panel (d): Map of the production of the correlation coefficient at three positions. The orange stars mark the slit position with the highest correlation coefficient. Its pixel coordinates are denoted in parentheses.