endpoint in dpos report

[Duane Frymire]

I sent files on two points to both opus and dpos. the results agree reasonably in horizontal but not height. The ortho height on the dpos solution is 0.1m higher in both cases. also the dpos report shows an endpoint that is not the point I named it, but rather "base1...". Is the configuration of the T2 as a base from an earlier day somehow being used as a default without the settings for the current occupation? I'm attaching the reports.

 

[Alexey Razumovsky]

Hi Duane, I am waiting for both files to dig up the reason.

 

[Duane Frymire]

Hi Alexey, I tried to upload here but will have to send email.

 

[Alexey Razumovsky]

Hi Duane. I guess you submited files to OPUS in unlucky day.
1. I've resubmitted files. Actually OPUS matches DPOS solution for point "duyer". 451.512 (DPOS height) vs 451.504 (OPUS height). Vertical diffference is 0.008 meters. It's OK for baselines above 70 km . In the last (attached to threat OPUS pdf report above) OPUS deals 451.403 m. Vertical difference (DPOS - OPUS) was 0.106 m.
So we have proved that OPUS was in error with point "duyer". The error was fixed now.
2. We still have only a problem with second point "stump". Now DPOS and OPUS remain last heights 453.200(DPOS) vs 453.100(OPUS). Difference equals 0.100 m.
Let's calculate vertical difference between points "stump" and "duyer" using DPOS values: 453.200 - 451.512 = 1.688 m.
Do the same with last OPUS values : 453.100 - 451.403 = 1.697 m. Vertical diffference is 0.008 meters again. Here OPUS matches DPOS. In the meantime we have proved that values 451.403. is wrong. It means that 453.100 is wrong also.
DPOS rules!

 

[Duane Frymire]

Thanks Alexey!

I was sure I must be doing something wrong myself. Because I didn't submit the files until several days after the observations I wouldn't have thought a re-submittal would make any difference.

Kinda scary that opus gives that result for a 6 hour static session. 3 of the 4 indicators for a good position were present in the opus report, so they would say to expect this. But that only shows opus can't reliably handle the kind of positioning I need. I have yet to get an opus with the indicator of "greater than 90% observations used".

Bravo to you and the rest of the team! Evidence shows DPOS is more reliable in the sort of conditions I normally work under. Small clearing in the woods, mountain terrain, more than 25 km from nearest base.

Awesome!

Duane