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Fig. 1

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Comparison of USUN and SYNOP data taken on 22 and 23 June 1998. The images show the integrated line radiances for the He i 584 Å and Mg x 625 Å lines in inverted, logarithmic scale (brighter areas correspond to fainter line radiances). The boundaries of the SYNOP FOV are also indicated.

This figure is made of several images, please see below:

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