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Correct antenna measurement w/R10 lever extension for OPUS  


FNG Member
Joined: 2 weeks ago
Posts: 1
January 9, 2019 7:00 am  

I have a Trimble R10 and need to upload static sessions to OPUS. What is the correct measurement that I need to use? Do I need to reference the ARP or Phase Center?

5,000+ posts Member
Joined: 9 years ago
Posts: 5101
January 9, 2019 7:19 am  

OPUS assumes ARP and makes you manually enter its height above the mark (not slant).  There are drawings on the NGS site (when it is available) showing where the ARP is for most models.  It is usually the bottom where an antenna screws onto a pole, but I am not familiar with that model.

Norman Oklahoma
2,500+ posts Member
Joined: 4 years ago
Posts: 4092
January 9, 2019 7:40 am  

The phase center is a point in an electric field. So that's not something you can measure. Not with a tape measure, anyway. You want the ARP, which is always the mounting point.  


This post was modified 2 weeks ago by Norman Oklahoma

"Convention is like the shell to the chick, a protection till he is strong enough to break it through." Learned Hand

Squirltech liked
Said Lot
50+ posts Member
Joined: 8 years ago
Posts: 60
January 9, 2019 12:36 pm  

I think OPUS is looking for the height at the top of the quick release/ bottom of antenna (0.05 m up from BQR)

250+ posts Member
Joined: 2 years ago
Posts: 384
January 9, 2019 1:55 pm  

ARP is what you're looking for.


This post was modified 2 weeks ago by Squirltech

Travis Nelson, CST

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