Balltracking - An ultra efficient method for tracking flow fields

H. E. Potts, R. K. Barrett and D. A. Diver

Astronomy & Astrophysics, 424 253-262 (2004)(free access)

These pages contain the multimedia content for the paper cited above. If you would like to use the codes, see the Google Code repository ( or contact Hugh Potts at


  1. Cartoon representation of the Balltracking method
  2. Fourier filtering of MDI data to extract granulation
  3. Simulated Granulation field
  4. Supergranular flow patterns
  5. Evolution of the Supergranular flow field