- 13 Replies
- MemberJanuary 28, 2020 at 12:45 amPosted by: @tje-yogi
I’ve seen people working in much worse multipath conditions..
- MemberJanuary 28, 2020 at 12:49 am
I don’t know. If he’s got a steel plate in his head, he’s blocking a whole quadrant of satellite signals with it. I’d raise the height up above my head. Surprising how much improvement you get with a little more HI.
- MemberJanuary 28, 2020 at 1:14 am
When you are picking up 15-20 satellites multipath is much less of a problem. Which is probably the point of the photograph, that you can work with GNSS in locations that were formerly unthinkable.
- MemberJanuary 28, 2020 at 3:30 pm
I once saw a two-person field crew performing single-base RTK topo work in a retail/commercial area, with the base set up next to a big box truck that blocked probably 1/3 of the horizon up to 45 degrees.
Each had a rover, and as I watched, one of them walked up to a building corner (approximately four-story height) and placed the receiver right against the building for what was maybe a three-second observation.
At the same time, the other yahoo was tying in edge of sidewalk while never holding the rod better than 20 degrees off plumb. This was before tilt compensation was common, and in any case his receiver was not a model that had tilt compensation as an option.
It was like a “Don’t Do This” example in a best-practices seminar.“…people will come to love their oppression, to adore the technologies that undo their capacities to think.” -Neil Postman
- MemberJanuary 28, 2020 at 4:29 pm
The cover needs some architect looking types, dressed in suits, wearing hard hats and pointing with a set of rolled up plans under their arms.Historic Boundaries and Conservation Efforts
- MemberJanuary 28, 2020 at 4:42 pm
That doesn’t look like much of a multi-path issue anymore.
1998 would have been a struggle, but today,,,,,,,,,,,ptttt.
Still no need lean your hardhat over the receiver.
- MemberJanuary 28, 2020 at 6:22 pm
Comon’ guys, can’t you tell this guy is 7 feet tall?
- MemberJanuary 29, 2020 at 4:02 am
I’m with you Boss. What can be seen in the picture does not present a multi-path situation, IMHO. Sure, he may be blocking a few signals being so close to the receiver. That appears to be a plastic hard hat, too.
I was taught that slab-sided, metal structures or vehicles had the ability to bounce signals that arrive just a tick after they hit the antenna, non-bounced.
OK, that was back in the early 90’s.
JA, PLS SoCal
- MemberJanuary 29, 2020 at 4:18 am
That is what I would call an unsupervised crew and one of the 1st no-nos for any licensed surveyor.
I’ve raked people over the coals before and sliding off from good procedure and being under the influence at work are two that really put me in a bad mood.
Both are pink slip choices for anyone unless they are family, and then they get the wrath of some well-directed fire and brimstone headed their way.
- MemberJanuary 29, 2020 at 4:21 am
Director to film crew: Can’t see the gizmo in the frame
Actor: the surveyor said this will let the gizmo down………..
- MemberJanuary 30, 2020 at 3:49 am
Remember back in the day when the equipment ads in the POB had the bikini models with the equipment- nobody complained about multi-path or authenticity back then….
- MemberJanuary 30, 2020 at 1:02 pm
I agree. It is astounding how much less frequently RTK GPS “lies” about a fix nowadays with bigger constellations.
Back when we often had only 4 or 5 satellites, my GPS lied to me frequently, until I bought Leica 530 system. After Leica got the bugs out of it, that system I honestly do not believe I ever discovered a time when even with very few satellites that it ever lied to me. If I could get my hands on a Leica 530 that had the same shape and dumb terminal mounted on a pole and with bluetooth instead of wire, I’d run over someone to buy it and the perfect pole that came with it. That system had a wonderful screen, very light pole, very light antenna, and the box was in a back pack and wasn’t much heavier than an R8 in the backpack. The hype to put it on a pole puts the stress on the arms instead of the back and legs where it is insignificant. They ought to do something like that again and with the processing unit in your back pocket like an additional wallet.
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