Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0717l&link_type=abstract
American Astronomical Society, SPD meeting #40, #7.17; Bulletin of the American Astronomical Society, Vol. 41, p.815
Astronomy and Astrophysics
Astronomy
Scientific paper
The MDI instrument produces both full resolution and binned Dopplergrams. Although one might expect the analysis of these two data products to give the same results in the medium-l range, in fact significant differences are observed, depending on both spatial resolution and image apodization. This can clearly be seen in raw mode parameters such as amplitude as well as in inversions of mode frequencies. Furthermore, the difference seems to vary from year to year. In this poster we shall examine the first 13 dynamics runs taken by MDI and try to account for these discrepancies.
Larson Timothy P.
Schou Jepser
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