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Status of MWO 60-Foot Tower f-Mode and Ring Diagram Analyses and Progress in High-Degree Ridge Fitting. Edward Rhodes LoHCo Meeting Tucson, AZ December 14, 2005. Progress in Analyzing MWO 60-Foot Tower Archive. Amount of Data Already Transferred to Stanford
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Status of MWO 60-Foot Tower f-Mode and Ring Diagram Analyses and Progress in High-Degree Ridge Fitting Edward Rhodes LoHCo Meeting Tucson, AZ December 14, 2005
Progress in Analyzing MWO 60-Foot Tower Archive • Amount of Data Already Transferred to Stanford • Recent Progress in Extending Zonal Flow Studies Back to Solar Cycle 22 • Recent Progress in Generating Flow Maps from MWO Ring Diagrams in 1995, 1996, and 2001.
MDI-Era 60-Ft Data Already Transferred to Stanford (as of August 31, 2005)
Status of Pre-MDI Era 60-Ft Data already Transferred to Stanford (as of August 30, 2005)
Progress in Analyzing MWO 60-Foot Tower Archive • Comparison of MDI and MWO Flow Maps from 1996 and 2001 hav e demonstrated that 60-Foot Tower field of view rotates very slowly during each observing day. • GONG and USC software routines have been used to estimate this image rotation. • MWO flow maps have been generated with correction for changing p-angles. • These flow maps suggest geometric differences which we now are trying to understand.
Comparison of MDI and MWO “Apparent” Short-term Position Angles Changes During One Observing Day
Comparison of MDI and MWO “Apparent” Position Angle Changes During 2001
July 1996 MWO Flow Map with Wrong Sign of P-angle Correction
Difference Between Original MWO July 1996 Flow Map and Map using Wrong Sign of P-angle Correction
“Corrected” MWO Flow Map for July 4, 1996, Using Correct Sign of P-angle Correction
Difference Between Original and Corrected MWO Flow Maps for July 4, 1996
Recent Progress in Ridge-Fitting • Have Made Progress in the Fitting of both unaveragted and m-averaged power spectra. • Unaveraged spectra are now fit using much wider spatial leakage matrices to correctly include Woodard effect distortions. • Unaveraged spectra can now be fit for degrees between 45 and 1000. • Averaged spectra now include n-leaks in fitted profile. • Frequency errors have been greatly diminished in the fitting of unaveraged spectra.