Integer Ambiguity Resolution confusion

[epigramx]

Integer Ambiguity Resolution confusion

[epigramx]

I started looking into the related code and I'm confused about something. Whenever there is a check for ARMODE_FIXHOLD (not GLO_ARMODE_FIXHOLD) there appears to not be "GPS specific" code there. So I probably miss something here because I have almost no experience on the engineering of the project (and none on understanding the math) but why was there even a GLO_ARMODE_FIXHOLD if it appears to not be GPS-specific on handling checks for ARMODE_FIXHOLD alone?

[epigramx]

I might have discovered a bug in your code related to this. GLONASS integer ambiguity resolution appears to never be turned off at ddidx() of rtkpost.c. If I turn it off manually at the top of the loop of that function it appears to produce results not found with the gui option set to off.

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I begin to get the impression that the original intend of the gloarmode setting, was to be able to just turn it off (because of the IFB issue mentioned in the upstream manual) and not so much to turn it on because that appears to be "on" by adding no extra code at all. Though that appears to be in contrast with your blog posts appearing to suggest that you can enable the fix and hold feature for glonass with a new setting (when that too appears to not need enabling by default) but it's very unclear to me if I don't understand something fundamental here because as I said I have almost no experience on the engineering of the project (and none on the math of rtk).

[epigramx]

For the time being I have concluded that the code just does integer ambiguity resolution by default for the major constellations anyway (at least if no configuration option denies that in ddidx() of rtkpost.c), so I don't see a reason to update anything in terms of basic constellation support for it (unless it's for avoiding bugs for certain constellations or tweaking their default related constants). Let me know if I'm wrong (and I'm possibly wrong).

[rtklibexplorer]

I believe your last summary is basically correct, the AR_MODE switch turns all ambiguity resolution on or off and the other switches (GLO_AR_MODE and BDS_AR_MODE) can be used to disable specific constellations.