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Fig. 1
A Dopplergram after removing the Carrington rotation and the 5-min oscillations. The position of the solar disk center (white cross) for August 23, 2000, at 9:30 UT is 137.1° in heliographic longitude and 7.0° in latitude. Scale in ms−1.The image shows exactly the region within the white solid lines in Fig. 2.
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