1. GONG Time distance pipeline status Shukur Kholikov

2. Outline Short description Some results and examples m=0 exercise

3. GONG merged velocity images 800x800 pix 1440 images

4. Remaping Use ± 70º in latitude and longitude Track relatively noon time of each day Apply backward filter (optional) Line of sight correction (optional) Produce daily acoustic power maps (optional, for future use)

5. Acoustic powermap example

6. Acoustic powermap with one single ‘dead pixel

7. SHT computations Lmax=550 (default) Option for any target region or hemispheres Mask-out active regions (optional)

8. Phase velocity filter Predefined 3 depths 7,12,30 Mm Option to filter out f-ridge Option to keep only f-modes

9. Reconstruction ± 57 in latitude and ± 50 in longitude Lat-Long or sin(Lat)-Long Corresponding acoustic power map

10. Cross-correlations Average, north-south, east-west Gabor wavelet fitting Demodulation and cos-fitting

11. Optional output products SH time-series LNU diagram for individual days Phase velocity filtered reconstructed images Travel times or differences Longitude averaged time series

12. North-south travel time differences ( Depth  7 Mm )

13. North-south travel time differences ( Depth  12 Mm )

14. North-south travel time differences ( Depth  30 Mm )

18. Meridional flow profile measurements with SOHO/MDI U.Mitra-Kraev and M.J.Thompson Astron.Nachr./ AN 328, 10, 2007

19. m=0 GONG 150 days

20. Travel time differences from longitudinal averaged images 2006-2007

21. 2001-2002