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I'm starting to look at the T/RH aspiration problems. During the last part
of Dec and early Jan, T.5m sometimes looks okay and sometimes bad as its
fan became more or less effective. The attached plot shows Rsw.in on the top,
spd on the bottom, and a flag, ib = abs(T.5m-T.2m)>abs(T.10m-T.2m). ib should
be 0. On every day during this period, ib was 1 sometime during the daytime
and 1 during the whole daytime period when the wind was calm.
There may be good data during some of this time period, but we'll never be sure.
173: Temp_RH, Site tower, Thu 27-Feb-2003 11:49:18 MST, brushed snow caps from 15-30m
From ~9:45-10:30, removed inlet tubes and then brushed snow caps off the Gortex
shields from T/RHs at 30, 25, 20, and 15m.
169: Temp_RH, Site tower, Wed 26-Feb-2003 15:37:08 MST, T/RH's on tower
14:40 5m T/RH replaced, 204 removed, ??? installed
15:00 10 m disassembled and an icicle removed from the teflon filter.
Reinstalled 10 m
16:25 - 16:30 Removed icicles from teflon filters of 0.5m, 1m, and 2m T/RH
158: Temp_RH, Site tower, Sat 22-Feb-2003 17:10:02 MST, TRH work - finding why 10m is a max
Dean and Larry have noted that the 10m T was a bit (~0.1C) high. I changed the fan at about 12:45, but this didn't help. Now, we've just swapped 5m and 10m
and now see that 5m is too high. Thus, there is a bit of a bias with the sensor
which is now at 5m. (And the one which was at 5 and now 10 looks a bit low!).
Since the fan I removed appears to have been working, I've put it back in the
cabinet in the trailer.
69: Temp_RH, Site tower, Mon 16-Dec-2002 18:31:26 MST, T/RH swapped back
We swapped the T/RH at 2m on the tower back with the sensor that was pulled
by Kurt 2 weeks ago, since it was reading about 0.2C high. (The one we just
installed has a new fan (which is quieter than the one we just removed.)
This done about 11:00.
45: Temp_RH, Site tower, Mon 09-Dec-2002 08:38:50 MST, 2m TRH
replaced 2m TRH (bad fan on original) Wed, Dec 4th
21: Temp_RH, Site tower, Wed 20-Nov-2002 09:38:03 MST, TRH heights on tower
TRH heights in meters on tower, as measured by SteveS.
0.5
1.0
1.95
5.0
10.0
15.5
20.25
25.2
30.2
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