The Washoe Lake surface met anemometer direction is intermittantly
failing. Times so far are listed below. Symptom is that the wind
directions becomes nearly constant, slowly drifting over time. Visual
comparison with the actual wind head direction confirms the descrency.
I looked at the Improved ISS2 data and did not see this problem (but
there were a few high wind periods when I was not sure).
The first time I tested. the problem dissapeared after a few Sun
reboots and cycling the power on the Campbell. However, the second
time I tested this, nothing corrected the problem. Most likely the
first time was coincidence and the problem is in the hardware rather
than software. (I did check the Campbell wiring for loose wires.)
FIXED AT 2230 on 5-Mar-2002
Times with suspect wind direction:
24 Feb 2230-2400
25 Feb 0000-0800; 1600-2400
26 Feb 0000-0700; 1630-2400
27 Feb 0000-0515; 1830-2400
28 Feb 0000-0415; 1545-1615; 1730-2400
01 Mar 0000-0230; 1830-2400
02 Mar 0000-0215; 1545-2400
03 Mar 0000-0345; 1530-1830; 2230-2400
04 Mar 0000-0200; 1615-2400
05 Mar 0000-0215; 1800-2230 (Replaced at 2230)
Discussion with Greg McCurdy suggested that the cable is bad rather then
the sensor. Could be the potentiometer in the wind head direction or could
be a bad wire/connection in one of the cable wires.