DPOS reports sent from LS and computer don't match

I took a shot in a difficult location and got an RTK lock and collected for 180 seconds, but it would not fix for verification. So I collected for 15 minutes and post processed with the LS and everything looks good, the LS chose the PPK fixed location and the RTK and CORS fixed solutions are close, but the position doesn't misses the record location by a couple of feet. So I thought that I would resend the JPS file from my computer to DPOS later with possibly more or better CORs data and see if anything changes. The reports don't match and the report from the computer shows a much worse solution. So I resent from the LS and it matches the earlier repost, then resent from the computer and it matches the earlier computer report. See the attached files and screen shots. Am I doing something wrong or why don't the reports match is the DPOS solution from the LS also using the base location. I am using Base and Rover for RTK.

Thanks,
Ron
 

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Matt Johnson

Well-Known Member
5PLS
So I thought that I would resend the JPS file from my computer to DPOS later with possibly more or better CORs data and see if anything changes. The reports don't match and the report from the computer shows a much worse solution.

CORS processing without your base station data does not return a good solution. Look at the RMS and residuals.

1534168211073.png


CORS processing files in areas of multipath and under tree canopy generally does not return good solutions and isn't recommended.
 

Matt Johnson

Well-Known Member
5PLS
There are better chances of a good solution with a much longer observation but I wouldn’t count on it.
 
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