Noted that at about 10 am - 10:04 am PST on top of End Y, the anemometer was pointing to about 20 deg to the -Y of +x and that sensor is not moving very smoothly.
The sensor is on the upper roof, about 1/2 way along Y, and about 8 feet from the +x edge, and about 6 feet up.
10 am = 1196013618 for 600 sec - epics data says that EY is about 360. so this is = north
Perhaps the EY sensor is aligned with north, but need to recheck.
tconvert 11:00:00 pst -> 1196017218
at 10:59 am, the EX sensor was pointed in the +x direction. It then moved to point in the -Y direction.
at GPS time 1196017200, the direction reading for EX is 183 deg.
at ...17254, it moves up to 271 degrees. I think this means that EX wind direction is aligned with the observatory coordiatates. That wind coming from the +x direction reads +180, and wind coming from the -Y direction readys 270. This is not crazy, since wind blowing from -x towards +x would read 0.
The EndX direction monitor is moving smoothly. I also note that the black hat thing has come off. looks like it used to cover a wire wound resistor and a toggle thing. I do not know what it is supposed to do, but it will probably be happier with the cover replaced.
I assume the black black hat thing is the cone that collects the rain. The toggle thing is the rain gauge. The heating resistor is there to melt the snow.
Went back and checked the EY anemometer this afternoon. Looks like the direction indicator for that one is not working correctly. At 3:39 pm I held the direction indicator so that it should read wind from the +X direction (180 according to Robert's site standard, see alog 28456 ). I held it there for about a minute, then pointed it so that it appeared to be a wind from the -Y direction, and should read 270. Held again for about a minute, then pointed back to +x (which is about where I found it, and where the wind is actually coming from). In the attached plot below, you can see that it isn't reading correctly, and also seems pretty noisy. (at about t=0, it should read 180, not 240, and around t=60, it should move up and read about 270, not 340)
Anyway, the EY anemometer direction is not to be trusted until Richard has a chance to take a look.