1. Edward Rhodes LoHCo Meeting Tucson, AZ December 14, 2005
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

2. 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.

3. MDI-Era 60-Ft Data Already Transferred to Stanford (as of August 31, 2005)

4. Status of Pre-MDI Era 60-Ft Data already Transferred to Stanford (as of August 30, 2005)

5. First MWO 60-Foot Zonal Flows from Solar Cycle 22

6. First MWO 60-Foot Tower Flow Map from Pre-MDI Era

7. Comparison of MDI and MWO 60-Foot Tower Flow Maps from 1996

8. Comparison of MDI and MWO 60-Foot Tower Flow Maps from 2001

9. 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.

10. Comparison of MDI and MWO “Apparent” Short-term Position Angles Changes During One Observing Day

11. Comparison of MDI and MWO “Apparent” Position Angle Changes During 2001

12. “Uncorrected” July 1996 MWO Flow Map

13. July 1996 MWO Flow Map with Wrong Sign of P-angle Correction

14. Difference Between Original MWO July 1996 Flow Map and Map using Wrong Sign of P-angle Correction

15. “Uncorrected” MWO Flow Map for July 4, 1996

16. “Corrected” MWO Flow Map for July 4, 1996, Using Correct Sign of P-angle Correction

17. Difference Between Original and Corrected MWO Flow Maps for July 4, 1996

18. Corrected MWO Flow Maps for Entire Month of July 1996

19. 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.