Atacama 6.11.2017 (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)) ticks on circle indicate sign (out-ward = divergence, in-ward=convergence)