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| Paper: |
Variations in Global Mode Analysis |
| Volume: |
416, Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 |
| Page: |
311 |
| Authors: |
Larson, T.; Schou, J. |
| Abstract: |
As with any data analysis, the standard Michelson Doppler Imager (MDI) medium-l analysis pipeline is based on approximations and somewhat arbitrary choices in the processing. It is furthermore known that the results of the standard analysis contain systematic errors, most notably a bump in the normalized residuals of the a-coefficients around 3.4mHz, an annual variation in f-mode frequencies, and possibly a polar jet in the rotation inversions. Our previous work has explored how these errors are affected by making various corrections to the analysis. In this article we extend our study to include a comparison of the results of full disk data to those of the binned data we have previously used. We go on to explore how several choices made in the analysis, such as the amount of zero padding and the width of the fitting interval, affect the mode parameters and the magnitude of the systematic errors. |
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