Atacama now (wind)
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Wind vectors derived from subsequent vis-images.
The retrieval is based on maximum in 2D-cross-correlation function over 32x32pixel tiles calculatred on a 24x24 grid.
Circles indicate value of divergence (the larger the radius the larger abs(div)) color and ticks on circle indicate sign (red and out-ward = divergence, blue and in-ward=convergence)