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John -

Hey, neat-o. A three-dimension bell-curve. So, any horizontal slice would 
contain the shots the same distance from spot-on; and viewed from the top, 
slices taken at equal vertical spacings would look like an archery target 
after lots of use?

Hewitt

Sent from my iPad

On Mar 15, 2013, at 6:17 AM, "John Karl"  wrote:

> Hanno, et al.,
> 
> We don't need numerical simulation to see that the probability around a 
ship's location, which is determined by two independent normal distributions 
of lat(x) & lon(y), is another normal distribution in the distance from the 
ship, r:
> 
> Prob = exp(x/s)*2  exp(y/s)*2 = exp[(x/s)*2 + (y/s)*2] = exp(r/s)*2 
> 
> which, of course, is maximum at r = 0.  Plot is attached with ship at 15,15.
> 
> JK
> 
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