Fig. 12.
Spectral region around 5576 Å, with the quiet Sun absorption spectra at the disk center (μ = 1.0, blue curve) and close to the solar limb (μ = 0.3, red curve). The atomic species are stated in gray. The emission spectra of the laser frequency comb (LFC, green curve) and the iron hollow cathode lamp (HCL, black curve) are displayed.
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