Problems maintaining single fix

tomojitakasu / RTKLIB

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Problems maintaining single fix #173

Open egorf opened 8 years ago

egorf commented 8 years ago

Hi!

I have an issue with very unstable single fix. It comes and goes, dropping down to -. Rtkrcv error console says: point pos error (chi-square error nv=20 vv=151.9 cs=34.5).

RTKLIB version is from the master branch.

tomojitakasu commented 8 years ago

The chi-square validation failed indicates the quality of pseudorange is poor. At first, try in open-sky environment.

egorf commented 8 years ago

Yes, I your comment from issue #121. However this seems to happen in a good environment with antenna mounted on a rooftop. Is there anything I can do in order to get deeper into the problem?

coandrei commented 8 years ago

You may try to 1) check if any unhealthy satellite is used 2) use a ground plane for the patch antenna (if that’s what you use)