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[aprssig] whatever happened to....

Jason Winningham jdw at eng.uah.edu
Tue Aug 21 16:14:18 UTC 2007


On Aug 21, 2007, at 6:40 AM, <gerheim at cox.net> <gerheim at cox.net> wrote:

> Doesn't increasing the ambiguity just round off the position data?   
> Then it would tend to jam all the stations into the same corner of  
> the ambiguity rectangle.  (OK - or the _center_ of the ambiguity  
> rectangle, depending on whether or not the data is truncated or  
> rounded off.)

The data is truncated.  Rev G of the spec says:

> Where the exact position is not known, the mm and hh digits in the  
> latitude
> and longitude may be progressively replaced by a V (space)  
> character as the
> amount of imprecision increases.


-Jason
kg4wsv






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