Can somebody please direct me to a document that shows the proper North orientation for a Trimble Zephyr Geodetic antenna?
I always used that little protruding notch but it really doesn't matter what you use as long as it's the same for each antenna. It's not the north part that matters, it's the all antennas oriented the same part that matters.
The Zephyr Geodetic has such a small amount of phase center drift it's probably within the noise of the measurement anyhow, so unless you're really trying to squeeze out every last millimeter I doubt if it makes much difference.
I want to be as accurate as possible and I am using this for OPUS work. I just wanted to find an official Trimble document for this.
I agree that consistent through out a local network is adequate, but since I will use in OPUS-DB and OPUS Projects I would like to do it right.
Thanks for the reply!
This is the only thing I could find, these specs are for the Zephyr Geodetic 2.
Here's a link to the manual for the R7 & R8's that describes the setup procedure for using the Zephyr Geodetic Antenna. It make no mention of the orientation of the antenna.
See B.6 of the attached file.
B.6 Orienting Antenna – The number 1 on the antenna was oriented to true north. The manufacturer’s specifications do not require the northern orientation as with the older systems
I wondered also where this guideline was good for ...
I was told this guideline came with the very first antenna's decades ago and does not apply to the modern versions.
Chr.
Kevin,
I used two Zephyrs with 5700 receivers in back packs at McGuire Reservoir over in the coast range.
When I was working that job Geoline in Tigard had Art B. on board doing repairs and some tech support. He knew more about Zephyrs and 5700's than I thought anyone could back then.
He's been on a bit of a hiatus, but I believe they've got him back on board and getting up to speed to do more training and support.
Give Jeff W. a call over there and he can let you know of Art is "online" with them yet. I'll wager he knows the answer off the top of his head.
If they had name tags yesterday I would've taken the time to stop by and get a handshake.... good posts!
While you're waiting for the official pronouncement -
(that probably will be that orientation does not really make any difference) you can read the Zephyr antenna white paper that Trimble published back in 2001 at the release of the first Zephyr antennas.
That publication describes in detail the theory, testing, and results. It's worth a read.
GB
I will follow up on that. Look for me at the next function, it would be great to formally meet!
While you're waiting for the official pronouncement -
Thank you Glenn, that is a good read! Very informative.
