Sunday, January 13, 2008


Do not ask me how, but I found myself looking at a GOES Wind VisitView this morning. The wonders of surfing the net is that I never really know what will catch my eye. I have been interested in the Visitview for a long time, since hearing about it at a conference. The SATREP online teleconferences use this software. So, upon looking for examples, I came across this description of the GOES cloud tracking description.

The item that caused me to write to this blog is the one on target selection.
Select Target/feature associated with strongest gradient

I have discussed Warm Front Shields in my previous posts. One of the features I have noticed in this CM (Conceptual model) is that it does not have strong gradients, in its most identifiable form in an IR image (i.e. without TA model assistance). It is one big fuzzy blob. It was such a system over the Netherlands (3 December, 1996) where I thought the EUMETSAT motion vectors should have been of very good quality because the animation showed a very smooth movement of clouds, all in one direction.

The surprise for me was that there were very few high quality vectors,

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