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Comparison of conductivity-corrected and modelled UT variations for (red) northern hemisphere, (blue) southern hemisphere, and (black) global aσ indices. Each panel compares the conductivity corrected values (solid lines) and the modelled values (dot-dash lines) on the same plot, as in Figure 18d. (a) For dawn, aσNcc(dawn), aσScc(dawn) and aσcc(dawn) compared with aσNm(dawn), aσSm(dawn) and aσm(dawn); (b) for noon, aσNcc(noon), aσScc(noon) and aσcc(noon) compared with aσNm(noon), aσSm(noon) and aσm; (c) for dusk, aσNcc(dusk), aσScc(dusk) and aσcc(dusk) compared with aσNm(dusk), aσSm(dusk) and aσm(dusk); and (d) for midnight, aσNcc(midn), aσScc(dusk) and aσcc(dusk) compared with aσNm(midn), aσSm(midn) and aσm(midn).
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