[FOSS-GPS] 回复：Re: RTKLIB FIX solution - Hold problem

[hexiaoxing]

0P0japPApP
Sent from Huawei Mobile

Yanqing <fishloveocean at gmail.com>编写：

>Minimum fix count is the number of fixed epochs before the integer ambiguities being used to fix the baseline.
>
>Kind regards,
>Yanqing
>
>> On 15 Oct 2014, at 20:51, David Kelley <DavidKelley at ITSware.net> wrote:
>> 
>> 
>> Jeremy
>
>> "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 https://www.ion.org/publications/search.cfm?searchText=+Ambiguity+Resolution 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
>> 
>> 
>> _______________________________________________
>> This message is sent to you from FOSS-GPS at lists.osgeo.org mailing list.
>> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your subscription
>> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
>_______________________________________________
>This message is sent to you from FOSS-GPS at lists.osgeo.org mailing list.
>Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your subscription
>For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS