On Site: TWH and Larry Mahrt
Weather:
Scattered clouds; light south winds; temperature 9 degC, 60% RH
Status:
Booooring...
To Do:
Categorized photos and retake photos of station configuration. Previous photos were often back-lit, which made the sensors indistinct.
Attend ISF group-heads meeting at 1:30 via Skype.
Vamoose.
On Site: TWH and Larry Mahrt (arrived last night with granddaughter)
Weather:
Low overcast, 10 m/s north winds at 10m, 12 deg C and 25% RH
Status:
All stations (DSMs) operational. Qsoil.c not reporting. 10m sonic ok with 10 m/s winds.
To Do:
Watch Broncos game this afternoon.
Discuss analysis plans with Larry.
Reset watch to MST.
November 3, TWH took photos of stations with Canon Power Shot SD990 IS. The last photo for each station was taken of the DSM to record the station ID. I did not always get this in focus, so I have listed the frame numbers for each station below.
1237 - 1244: main tower
1245: radiation stand
1246 - 1247: cactus soil
1248 -1249: grass soil
1250 - 1251: a11
1252: main tower base & Picarro
1253 - 1258: a1
1259 - 1263: a2
1264 - 1267: a4
1268 - 1271: a5
1272 - 1274: a6
1275 - 1279: a7
1280 - 1283: a3
1284 - 1287: a9
1288 - 1290: a10
1291 - 1294: a8
1295 - 1297: a12
1298 - 1300: a13
1301 - 1302: a14
1303: a17
1304: a15
1305: fiber optic, north end
1306 - 1307: a15
1308 - 1311: a17
1312 - 1314: a16
1315 - 1318: a18
1319 - 1321: a19
1322 - 1325: c20
November 3, ~13:30: TWH cleaned radiometers and Licors
On site: twh
Weather
Clear early, thin stratus at 11:00; light winds; temperature ~ 10 degC
Status
M21 and M22 down since 18:19 Nov 2. Recycled power on M21 around 10:15 Nov 3 and now running again.
ToDo
Take ?photos
Daily status, November 2:
Weather
Overcast, clearing from west; breezy winds from the north around 4 m/s at 10 m; temperature around 10 degC.
Status
All stations (DSMs) running.
No apparent sensor issues except for occasional CSAT diagbits (A19 particularly) and intermittent Qsoil.c (which is currently running).
ToDo
Take photos of stations after lunch with Canon camera.
Start on CentNet radiometer and sonic intercomparison data analysis, which did not happen yesterday.
November 1: took closeup and wide angle photos of stations A1 - A7 with my iPhone.
November 1, about 16:00: washed and waxed radiometers and leaf wetness sensor.
I looked at the 5-minute averages of ldiag for the CSAT at station 17 back to Oct 25, 18:00 MDT. (Recall that ldiag = 1 if any of the bits in the CSAT diagnostic word is non-zero.) It appears to be independent of wind speed and to occur for winds from NW to N and occurs more frequently with increasing temperatures (above 7 degC). (Note that temperature and wind direction are themselves uncorrelated). However non-zero ldiag is very occasional and is never greater than a five-minute average of 0.003, so this does not appear to be a serious issue requiring replacement of the sonic.
Here is the Splus output of hist(dat("ldiag")) for that period. $breaks are the boundaries of each 'bar' or 'class' of the histogram and $counts are the number of occurrences in each class. For example, there are 16 occurrences of the 5-minute average of ldiag falling between 0.0002 and 0.0004. Note that one occurrence in a 5-minute average is 1/(300 sec*20 samples/sec) = 0.0001666..., so the first histogram class between 0 and 0.0002 includes both zero and 1 occurrence in 5 minutes.
$breaks:
[1] 0.0000 0.0002 0.0004 0.0006 0.0008 0.0010 0.0012 0.0014 0.0016 0.0018
[11] 0.0020 0.0022 0.0024 0.0026 0.0028 0.0030
$counts:
[1] 1875 16 2 10 7 2 1 1 1 1 1 0 1 0 1
The frequency of occurrence of non-zero diagbits is 0.002% of the data, calculated as
sum(counts*breaks[-length(breaks)])/sum(counts)
after increasing the number of classes in the histogram from 15 to 100 to improve the accuracy.
On site: TWH
Weather at 0900
Thin overcast, light northerly winds, temperatures ~10C; low around 0C last night.
Status
All stations (DSMs) up and reporting.
Diagbits @ station 17 currently ok.
Cockpit: Spd.0.5m#0 has scale of 0-0.5m, while others are 0-20.
Cockpit: Dir.1m#1, #15, #17 show some off scale data, which might be associated with current northerly winds. Could we improve the wind direction plots to minimize 'wiping' for north winds?
ToDo
Radiometer and sonic intercomparison analysis.
Waiting for Godot...