12:20 - 13:00
clear, cold, and light winds
After a conversation with Sebast1an, we found out the proper way to setup the shadowband.
(1) set the angle of the ring support arm to the latitude of the site not the sun's elevation.
(2) adjust the position of the shadow ring such that a shadow is cast on the center of the Licor (the ring is moved up or down on the support arm.
Tom completed the re-alignment at 12:47. This included aligning the unit to south
12:35 .Radiometer domes were cleaned
15:30 - 15:40
revisit because diffuse reading low. Connector was loose, reset and all is well.
Sensor was unshaded for a short time
Status evaluated from 36 hour plots on Feb 2 08:30-09:00 MST
On site: Semmer and Horst
Weather: Clear and cold with light winds
Summary: Questionable precip tips
3 hrs missing rad data at Riverton
All Tsoil frozen
4.4 cm Tsoil bad at E Slope
Qsoil bad at W Slope main
Todo: work on shadowband at riverton and playa
Vdsm: ok, > 12.2V
Vmote.rad: ok, > 12.5 V
Vmote.soil: ok, > 12.2 V E Slope main lowest
P: ok
Tbaro: ok
T: ok, low = -18 degC at W Slope`
RH: ok
Q: ok, mostly < 1 gm/kg
Rainr (3,4,6): ok, tips last night at all 3 sites; seems erroneous
Spd (1,6): ok, down to 3 m/s at w Slope, less at Playa
Dir (1,6): ok, currently N
csat diag: ok
spd: ok
dir: ok
u'u': ok
v'v': ok
w'w': ok
u*: ok
sigma_w/u*: ok
tc: ok
tc'tc': ok
w'tc': ok
kh2oV: ok, 1-3 V
kh2o: ok
kh2o'kh2o': ok
w'kh2o': ok
Rsw.in: ok
Rsw.out: ok
albedo: ok
Rsw.dfs (1,7): ok
Rsw.global (1,7): ok
Rlw.in: ok, 3 hrs missing at Riverton
Rpile.in: ok, ditto
Tcase.in: ok, ditto
Tdome.in (1,2,5): ok
Rlw.out: ok, 3 hrs missing at Riverton
Rpile.out: ok, ditto
Tcase.out: ok, ditto
Tdome.out (1,2,5): ok
soil.aux at E & W Slope (5,6)
Tsoil: 4.4 cm at Eslope has gone walkabout
Qsoil: ok, W slope main has gone walkabout
Gsoil: ok
Cvsoil: ok
14:30 - 15:00
Clear and cold with winds
This was an afternoon adjustment of the shadowband. It appears the latest change made with the mounting of the Licor
sensor did not help. Tom found he had to make a major elevation change to shadow the sensor. He left the setting at 32 degrees.
Kurt is sending out one of the other shadowband units so we can do some comparisons
Status evaluated from 36 hour plots on Feb 1 15:15-15:50 MST
On site: Semmer and Horst
Weather: Clear and cold with high winds
Summary: 3 hrs missing soil data at E Slope aux: 1/31 22:00 -> 2/1 01:00
Todo: work on shadowband at riverton and playa
Vdsm: ok, > 12.2V
Vmote.rad: ok, > 12.6 V
Vmote.soil: ok, > 12.2 V E Slope main lowest
P: ok
Tbaro: ok
T: ok, low = -12 degC at W Slope`
RH: ok
Q: ok, 0.75 g/kg
Rainr (3,4,6): ok,tips this morning a Wslope and riverton
Spd (1,6): ok
Dir (1,6): ok, currently NE
csat diag: ok
spd: ok
dir: ok
u'u': ok
v'v': ok
w'w': ok
u*: ok
sigma_w/u*: ok
tc: ok
tc'tc': ok
w'tc': ok
kh2oV: ok, all > 1 V this afternoon
kh2o: ok
kh2o'kh2o': ok
w'kh2o': ok
Rsw.in: ok
Rsw.out: ok
albedo: ok
Rsw.dfs (1,7): ok
Rsw.global (1,7): ok
Rlw.in: ok
Rpile.in: ok
Tcase.in: ok
Tdome.in (1,2,5): ok, spread in readings at each pyranometer this afternoon
Rlw.out: ok
Rpile.out: ok
Tcase.out: ok
Tdome.out (1,2,5): ok, (smaller) spread in readings at each pyranometer this afternoon
soil.aux at E & W Slope (5,6)
Tsoil: ok, but spikes at 1.9 cm at Playa and 3 hrs missing data at E Slope aux
Qsoil: ok, up to 38 vol% at Playa; 3 hrs missing data at E Slope aux
Gsoil: ok, 3 hr missing data at E Slope aux
Cvsoil: ok, missing data at E Slope aux
12:30 - 13:15
clear and cold with high winds
Re-adjusted the shadowband so it is like the unit at station 7. Elevation angle before any changes was 31 degrees. Elevation angle set to 34 degrees based on shadow cast on sensor.
Program said angle should have been 32.2 degrees.
8:30 - 9:00
Clear and very cold with high winds
Re-installed shadowband with modifications. We still suffer from sunshine when the unit is set to the correct elevation angle.
Tom lowered the licor in the mounting block such that the top of the sensor is in line with the pivot axis of the block.
Now we are getting shading at the correct angle.