Open Access

Table 1.

Average value of the formation height of the line-chord images for the Fe I 630.15 nm line above the 630 nm continuum level.

Line chord 20 19 18 17 16 15
z (km) 7.6 ± 0.6 9.9 ± 0.9 12.8 ± 1.1 16.4 ± 1.5 20.8 ± 1.9 25.7 ± 2.4

Line chord 14 13 12 11 10

z (km) 32.6 ± 3.9 41.3 ± 5.9 51.0 ± 8.4 61.4 ± 11.8 74.0 ± 16.5

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