Nothing to see here, keep moving...
BM in base of sign
[SARCASM]It's an R8s- it'll sort everything out......[/SARCASM]
Has to be a DOT crew (or not)!
Base for machine control / BIM. No excuses about a pre existing monument being near the sign. They chose this spot. Luckily for them multipath filtering is pretty good these days.
It goes [way] beyond "just" multipath concerns.
If you have big ass (or little ass close by) signs, trees, buildings, trucks WHATEVER, the base/rover is NOT seeing all of the birds. In the case of an RTK Base Station, you want/need that baby in a place that "sees" EVERYTHING. Rover locations are what they are, and if they stink, then you need to move out of the "shadows." In any case...stupid is as stupid does.
Loyal
Probably a stupid question here, but in RTK mode, is the multipath "awareness/sorting" capability in the quality of the receiver hardware/firmware or the DC software, or both?
Richard Imrie, post: 438683, member: 11256 wrote: Probably a stupid question here, but in RTK mode, is the multipath "awareness/sorting" capability in the quality of the receiver hardware/firmware or the DC software, or both?
There isn't a "high multipath" idiot light. But there will be a signal/noise ratio number which is partly caused by MP.
This is a conventional control station that a peer new to GPS wanted to establish geodetic coordinates on, so he got them with a single 3 hour occupation via OPUS. Remarkably, the OPUS overall RMS was a mere 0.022, but the latitude peak-to-peak was 0.005 m, longitude peak-to-peak was 0.168 m, and ellipsoid height peak-to-peak was 0.154 m.
Photo taken at noon so the house and tree are to the southeast. Photo cropped to protect the guilty.
And yes, he did get the Leica gear out of the box and turned it on. 😉
The occupation shown in the picture I posted was to get a position only for recovery, not for a BM tie. Still, I imagine the data is pure crap. But it is a good example of a bad occupation.
Years ago I was working at an air force base locating utilities. The company that had the project had a guy there, and we were helping him. This guy was a BIG guy, north of 250 pounds. It was comical to watch him try to locate the point on buildings where the utilities went in. He would stand away from the building to initialize, and then run up to the side of the building as fast as he could, hoping to get a reading before he lost initialization. I would just get two points on line and then extend the line to the edge of the building in CAD (we also were doing aerial mapping so all of the buildings were in the drawings).
Here is a setup I saw once in Florida...
