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Nice day yesterday in Napa County CA
Haven't gotten the chance to do any surveying in California. Thanks for sharing the photo.
It would be nice if Trimble had a better measure up method in that situation. I have been unscrewing the receiver up a hundredth or so then sight over the top of the extension pole. Have to remember to screw the receiver back down.
It was a nice day. Big Bear Lake, CA
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How come my former surveyors I have worked w are working nicer sites than?ÿ me today.?ÿ?ÿ
I had to go look at a failed drainage pipe 10 feet below grade with a bunch of attorneys, soils engineer and an old CE I worked w in 1980.
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I have been unscrewing the receiver up a hundredth or so then sight over the top of the extension pole. Have to remember to screw the receiver back down.
Why not sight over the tribrach adapter and then add the extension length??ÿ (And maybe cut the 0.01' or so that's introduced by the tape slant at typical HIs.)
we have one of those for the base.
the other two R10 receivers are measure up to bottom of quick release. It has a bumper but they don't offer that as an option as they did on the earlier R type receivers.
I really can't understand surveyors that don't use fixed height tripods.....
Fixed height tripods aren't.
I presume that you mean fixed height rods supported by a 3 legged "bipod". Here's the reason.?ÿ The rod bubble is a 20 minute bubble. The bubble on a tribrach is an 8 minute bubble. You just can't plumb a rod over a point to the same accuracy that you can a tribrach. So what you gain in vertical you lose in the horizontal.?ÿ
We use one of these for every base position: https://secure.fltgeosystems.com/tripods-bipods/seco-fixed_height-gps-antenna-tripod-sec5119-00-fly/
10 minute vial, takes all of 30 seconds to set up and plumb over the point, and there is NEVER any question as to what vertical was used for the setup.
The base goes on that all day long?
I'm going with the OP set up for my base.
Measure up vs stability, stability wins every time.?ÿ?ÿ
@dave-lindell Aren't fixed height, or aren't tripods??ÿ I haven't found any significant height deviation, but it's true that they're actually quadripods.
@mark-mayer It's easy to swap in an 8- or 10- minute bubble.?ÿ That's what I've done with all my poles.
