I'm looking into ways to set up a permanent base and creating a known location for my gps unit, so that it can send corrections as a base to my rover unit.
Should i just submerge the 0.50m extension rod into cement somewhere along my roof, or should i tie a cylindrical pipe running upwards from the wall.
Which is more convenient, cost effective, sturdy, wont damage my unit, wont give me positional errors due to moving through time, etc?
Summing up.
A) Drilling a hole and leveling this directly on the rooftop
B) Something like this that ive been seeing
Depends if you're gonna leave the antenna permanently, or if you occasionally need to use it elsewhere. It's all about rigidity, clear view, cable length, and not getting hurt to put it up. And don't forget lightning hazard.
Here is mine. We had the Bracket custom made. You cant see the outside of the building , but there is a piece of 3/4" foam wedged between the bracket and the face of the building. I am about to have to move it to the other side of the mountains 🙁
If your building is brick I like option B - secure 2" or 2.5" galvanized pipe to the wall and have the antenna protrude at least 18" above the roof to minimize multipath.
I think the wall mounted operation seems like a safer option. I do not know much about setting up a permanent GPS base, but I know about bolting some sh*t to concrete and endorse Hilti brand anchors, I like the 1/2" threaded with a 5/8" bit size, no need for the fancy bit, just use the hand setting tool for driving the anchor.
https://www.us.hilti.com/anchor-systems/flush-anchors
I would practice a couple times on scrap concrete and make sure the conc. you are working on is of sufficient quality before going all in.
It seems like you [robably aren't using much space in the building. Negotiating a trivial rental fee to retain the current installation should be a lot cheaper than having to do a new installation and calibrate everything so the project doesn't shift. Have you pitched that to management?
Bill93, post: 415679, member: 87 wrote: It seems like you [robably aren't using much space in the building. Negotiating a trivial rental fee to retain the current installation should be a lot cheaper than having to do a new installation and calibrate everything so the project doesn't shift. Have you pitched that to management?
That was my first inclination, but they are bent on taking the servers.
We set up base stations for construction projects all over the US. The pictures here are of a pole we put up in Wyoming. Due to the winds we added the tie out lines for extra security. Our longest continuously running base station has been in place since 2013. It runs on a solar panel and deep cell battery. If this type of setup is something you are interested in, let me know.
That is kind of what I am thinking, that or a drilledshaft extension. I wish I could go solar, I have the perfect spot up on the rim of a quarry canyon behind our complex.
Here is one that I had on a roof top in Dallas. It had an SNM940 receiving the corrections from a nearby jobs base and a repeater.
And a base and repeater set up in Little Rock
We were working in Colombia on a 4 month project and staying at the 10 story tall Hilton. I looked around and asked if I could be on the top floor at the east end. Si senior, denada senior. Then I asked to go to roof. No problemo. There were pipes all along the perimeter of the building for flags. Stuck a 5/8" rod with nuts into the flag holder, voila. Dropped the cable onto the balcony.
A year later the project got extended. I asked for the same room, and if the maint. guys could let me up to the roof.
"Si senior, nice to see you again, we kept your antenna mount in place. It was starting to rust, so we greased it."
And the PPP solution was hardly a cm different.
Lefebure ntrip caster
I have always used UHF with my units and was told about this gem. I am ready to embed a rod in concrete in an old chimney and might make the leap.
You can check out the NGS requirements on line for their accepting of a CORS site, might be overkill for your purposes, but will be somewhere solid to start.
