July 21, 12:45 CDT and past three days
Tom Horst (in Boulder)

Summary: Stations 1-4 operational, no ISFS staff on site

** Need to check on 2 m TRH fans.  Visit all stations, but 2 and 4 are suspicious from data.**

** I don't know how to interpret lidiag.   w'h2o' at stn 1 significantly low during day.**

Vdsm: 13.5-14 V during day, down to 12.5 at night
P: ok, relative pressures suggest site rises from south to north(?)

T.2m: stn 2 warmer than others during the day (fan??)
RH.2m: stn 4 high during day; stn 2 lowest at night
H2O.2m: stn 4 high during day

Wetness: Rain/dew on the nights of July 18-19 and 19-20

T.10m: stn1 warmer than others during the day
RH.10m: ok
H2O.10m: ok

Spd.10m: ok
Dir.10m: ok

T.10m - T.2m: stn 2 most negative during day; see T.2m
H2O.10m - H2O.2m: stn 4 most negative during day; see H20.2m

spd.4.5m: ok, see comments for Spd.10m
dir.4.5m: ok
w.4.5m: ok
tc.4.5m: ok, all sites agree within +/- 0.5 degC
ldiag: ok

kh2oV: anomolous increase at stn 4 night of July 18-19
kh2o: anomolous decrease at 4 and increase at 2 night of July 18-19
h2o(licor): ok
lidiag (licor): numerous spikes at 3 only a few at 1

TKE.4.5m: ok
w'w': ok
u*: ok

w'tc': ok
tc'tc': ok

w'h2o': ok, stn 1 significantly low during day
h2o'h2o' (licor): ok
kh2o'kh2o': stn 4 similar to licors; stn 2 low

w'co2': ok
co2'co2': ok

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1 Comment

  1. Dan Rajewski AUTHOR

    Russ and Dan visited all the stations on July 22.

    The 2m Temp/RH fan is running at Sites 1, 3, and 4.  The fan at site4 has the most pronounced ventilation noise.

    Site 2 the fan is completely off and so the 1.5 to 2 degree difference in temperature between stn 2 and the other sites is most likely explained by the lack of aspiration through the sensor.

    Steve Oncley will visit the site on Monday to repair the krypton sensors at stns 2 & 4 and the 2m fan apparatus at stn 2.   There should be a 'spare' fan unit in the white cooler in Russ' office.  He and I will check this weekend or on Monday.

    The confusing signal of the ldiag signal is more noticeable at stn 3, which is perplexing because on several occasions this week Russ and Dan heard a continuous 'clicking' noise at stn 1.

    The sound seems like it is coming from the licor; a very high frequency "click...click..click...click" followed by a drawn out click and then the pattern somewhat repeats.

    There is no such noise at stn 3, but that doesn't explain the poor ldiag response.