* Peter Brown -- Sunday 20 December 2009:
> IMHO there is no choice other than the bold solution- anything reported as
> 10SM = unlimited, and 9.99 and less is actual. 

And so guaranteeing the lowest possible frame rate? Sounds like a truly bad
idea. The whole thing has been discussed before. (Threads "Flying over an
island" and "Estimating visibility"). Thomas FOERSTER announced that he'd
use some Bayesian analysis to get a formula from various available parameters,
such as temperatures, air pressure etc.

  
http://www.mail-archive.com/[email protected]/msg15710.html
  
http://www.mail-archive.com/[email protected]/msg15843.html
  
http://www.mail-archive.com/[email protected]/msg15851.html

In any case, if someone writes a heuristic, then this does *not* belong
into SGMetar but FGMetar. Unless the weather subsystem is the next which
is going to be ruined ...

m.

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