DPOS ONLINE ERROR

[Bryan Enfinger]

Just processed a file done yesterday p.m. using DPOS and OPUS-RS. It looks like there is a processing error using Justin; the ellipsoid and ortho heights are approx. 2 meters different and lower than the OPUS-RS solution. The observation was on an NGS station. We did a small static survey on 9/13 and thought there was an input error on the antenna heights but that was not the case. We ended up using the OPUS solution for the project. See attached info

 

[Bryan Enfinger]

Just processed the same file using the GIODIS engine; ellipsoid and ortho heights agree with the NGS datasheet

 

[Bryan Enfinger]

Apparently the Justin engine is applying a vertical offset automatically when it is set to auto ? Why is this happening ? (see highlighted area)

 

[Matt Johnson]

@Alexey Razumovsky have you looked into this yet? The antenna height was being applied twice, both as an antenna height and vertical offset, in Bryan's report.

 

[Alexey Razumovsky]

No, I haven't the jps file to look into. In the meantime no doubt that there are both antenna height and vertical offset messages in the file. I remember that I've already seen that.

 

[Bryan Enfinger]

I just processed another file done Friday 09/15, both times using Justin engine and using "auto" for the antenna offsets and then manually input "0", the reports are the same. OPUS-S solution was almost identical for this file. Maybe it was a fluke or something. I don't usually use any of the antenna offsets parameters, if ever. I can send the data file if you provide an email.

 

[Alexey Razumovsky]

Post the file right here. I'd like to complete the issue. Otherwise a.razumovsky@javad.com
I dislike topic title.

 

[Alexey Razumovsky]

Thank you for the file. Antenna vertical offset exists in jps file. Antenna height has been also added manually in DPOS web page.

Just curious what software did you use for receiver settings?

 

[Bryan Enfinger]

We've got the Javad Triumph LS package, My brother Buck uses it almost exclusively in our daily field work. He might have located some other features during this observation. Mainly we wanted to check into a known mark for the antenna height problem. Great equipment !!! We also have another T2 without RTK. We really appreciate the Javad team. Shawn and Matt has helped us many times during purchase and updates. Javad is the cat's meow in GPS equipment !! Thanks for your help on this Alexey !