Douglas Butler wrote:
> This might be a little out of the realm of amateur weather radar, but
> there is a technique I know of to measure the speed of silt particles in
> seawater using a laser.

Laser Velocimetry. Its used in wind tunnels too, except with dust in
moving air. There are two problems with it though, 1. tracking lots of
particles takes an enourmous amount of computing power, not to mention
the video capture requirements; 2. Near particles can obscure far
particles. Normally you don't think of a dust particle being big enough
to obscure anything, but since they're bright they can take up several
pixels, which will obscure other particles, or at least make the
boundary ambiguous. And then when the two particles seperate again, you
have to figure out which one is which. Tracking millions of water
droplets would be a big task.

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