Today’s unique setup
I’m hoping to submit a GPSonBM session on a bench mark that poses a bit of a problem. It is mounted on the base of a cannon in the city park, and the cannon overhangs almost exactly half the disk. No room for a pole and hard to get a tribrach over it.
So I made myself a rig to hold the antenna exactly 0.500 meter above the disk. A hole in the bottom bracket lets me see that it is centered, and a hole in the top bracket fits a 5/8 bolt to hold the antenna. I plumbed it with a hand level, and expect to be within a couple mm sideways. The board on the tripod is tapped 5/8-11. The braces to the tripod were adequate on a still day, but probably wouldn’t be good in wind.
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