[FOSS-GPS] RTKLIB FIX solution - Hold problem

David Kelley DavidKelley at ITSware.net
Wed Oct 15 11:51:08 PDT 2014

"Minimum Fix Count" ?   I do not understand  the question.
Perhaps you meant the AR ratio?, RTKLIB calls this the "Min. Ratio to 
Fix Ambiguity"

If that is correct, and you wish to be "generous" at the expense of 
increasing the overall probability of a false Ambiguity Resolution fix 
(selecting the wrong set of integers result in an incorrect position), 
then use a value like 2.7 or so.  Do not go much lower.

[ My limited experience with RTKLIB on this is to leave the value alone 
and it does a very good job using a classic comparison of  the ratios 
method. However this is clearly an area where the tool can be improved, 
but I would not expect such improvements to become easily available as 
open source.    For those that care, the optimal AR process is a very 
complex topic, see 
for a good summary of the key literature, but again now you are into 
things rather deep ]

Regards, David Kelley

On 10/15/2014 12:36 AM, jeremy.bouathong wrote:
> Hi David,
> thanks for your advice. Do you know what is exactly the Minimum Fix Count to
> Hold the Ambiguity?
> Regards,
> Jeremy

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