I find a lot lately that i cannot use the GPS. Either there is insufficient radio connection, or you cannot get a quality fixed solution and end up getting floats and dgps in city like environments, it seems like there is always need for total station and additional field measurements to be taken. Unless of course you are measuring open fields that are out in the open with a clear sky view leveled and primed to the surveyors satisfaction.
Anyway don know what the situation is like on America, but here on Europe where city environments are so condensed, it always ends up giving us problems.
So whats your experience and any tips on how to be more productive when using GNSS solutions
Careful radio channel selection.
Careful base station site selection.
(I once set my base, up on a mountain, near a bunch of cell towers, it really failed, due to bleed over, of rf)
There is always a reason.
Some are solvable.
N
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Hi Nate. So how do you tackle the bleed over whenever you encounter it, and what is the proper frequenct selection procedure? Do you use a scanner for the area
Scanners are helpful. Nate and I both use the Javad-LS, which has a scanner built in (awesome!)?ÿ
Hi Nate. So how do you tackle the bleed over whenever you encounter it, and what is the proper frequenct selection procedure? Do you use a scanner for the area
Check your local laws.
Check with a local radio shop.
There's alot of solutions. Finding some for your area often requires local knowledge.
N
I'm pretty sure all frequencies operating on the range used by gps equipment are legal, i'm just a novice on radio communications matters. So what am i supposed to listen to when scanning the area, and how do i determine the optimal if any frequency for my setup? I'm interested mostly on the operational know-how before i decide to purchase something
450 to 470 is a wide spectrum. Not all channels here are available, for automated transmission, or data.
Out in the country, (un crowded, as far as rf goes), there is no problem. That's where I live.
But, as you move closer to the big city, the crowding of radio frequency begins.
This is where your local radio shop comes in.
They can help you with this.
No substitute for professional local help.
Don't hire an "out of town surveyor".
That will only get you "out of town" advice.
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Europe is a very big place. Most of the cities I have visited are 'urban canyons'. Even if you get radio you may be hard pressed to get decent sats.
We rarely use radios, I prefer to do RTK by cell. We do have an intuicom bridge, which is a combination cellular/UHF solution. The bridge connects to the base by cellular, and transmits at low power UHF to the nearby rover. I also have a Trimmark 3 radio, the only time I have used that in the past year is when we are doing hydro and I am trying to minimize the latency (not sure if that is a big issue, but also the area we were doing hydro in was not a good cell area).?ÿ ?ÿ
