AHATS daily status 7/21/08
Staff: Semmer, Oncley, Knguyen, Tudor with ISS
Horst has just left for a well-deserved break...
Max temp: only 89F and min 59F yesterday! (with broken clouds)
- An extension of AHATS operations for 6 additional days has been approved.
- As of 16:00 yesterday afternoon, we are now in configuration #2.
For more details, see the ahats logbook at https://wiki.ucar.edu/display/ahatslogbook
Good wind direction: Winds turned perfect at 10pm last night, so we now
are in a 13-hour period of good data (obviously both stable and unstable).
Local data storage: (all now quite low)
------------------
root@upwind root# df | grep usb
/dev/sda1 57685532 2453532 55232000 4% /var/tmp/usbdisk
root@downwind1 root# df | grep usb
/dev/sda1 57685532 2745012 54940520 5% /var/tmp/usbdisk
root@downwind2 root# df | grep usb
/dev/sda1 57685532 3164908 54520624 5% /var/tmp/usbdisk
root@profile root# df | grep usb
/dev/sda1 57685532 2109752 55575780 4% /var/tmp/usbdisk
root@pressure1 root# df | grep usb
/dev/sda1 3940812 317660 3623152 8% /var/tmp/usbdisk
root@pressure2 root# df | grep usb
/dev/sda1 3940812 312264 3628548 8% /var/tmp/usbdisk
aster: df | grep isff2
/dev/sdb1 721075720 242010508 479065212 34% /media/isff2
isff: df | grep isff3
/dev/sdb1 961432072 367926356 593505716 39% /media/isff3
Pressure:
--------
Has been running since late 19 Jul. when set into configuration #2
(+/- = ~1 std deviation among variables at the same height)
9t connector in box loosened -- fixed yesterday afternoon,
p: ok, +/- 0.03 mb
p'p': ok, +/- 0.001 mb^2
w'p': ok, +/- 0.002 m/s mb
t: 6b&6t are outliers by 5degC now, others +/- 1.5 degC
Pref: now steadily drifting low -- might be cooling of the reservoir
(which was reburied Sat morning -- 2 days ago), but looks strange.
now 11mb below ambient.
Profile: [,select.p]
--------
Has been running since late 18 Jul. when set into configuration #2
diag: ok, recent spikes on 13b when Y-cable added to 3m profile
samples.sonic: ok
T: ok
RH: 4m is low by up to 2% RH -- we'll swap in a spare
P: okay
spd: ok?, 8m generally lower than 7m
dir: ok
w: ok
tc: ok, 8m low by ~0.3 degC?
w'w': ok
u*: ok
sigma_w/u*: ok (1.3 at night)
w'tc': ok
h2o: now okay after swapping Li7500s, offset of ~1.3 from dat("Q")
w'h2o': ok, 0.02 m/s g/m^3 at midday
co2: ok, 15 mmol/m^3
w'co2': ok, -0.01 m/s mmo/m^3 at midday
Upwind (hts=3.3): [,select.u]
----------------
Has been running since late 18 Jul. when set into configuration #2
Sonics were moved in height yesterday morning.
diag: ok, spikes during move
samples.sonic: ok, drops during move
spd: ok, +/- 10 cm/s, suggestion of systematic differences
dir: ok, mean offsets of up to 13deg -- need to enter new Vazimuths??
w: ok, +/- 5 cm/s
tc: ok, +/- 0.2 deg, 4u changed offset by ~0.3degC since move -- perhaps
it got bumped?
w'w': ok, +/- 0.005 m^2/s^2 (30 min avg for second moments)
u*: ok, +/- 3 cm/s
sigma_w/u*: ok (1.3 at night)
w'tc': ok, +/- 0.01 m/s degC, again systematic??
tc'tc': ok, +/- 0.05 degC^2, again systematic??
Downwind Lower (hts=3.3): [,select.b]
------------------------
Has been running since mid 20 Jul. when set into configuration #2
diag: ok
samples.sonic: ok
spd: ok, +/- 30 cm/s
dir: ok, +/- 3 deg, offsets now smaller than config #1??
w: ok, +/- 15 cm/s, now larger deviations and systematic negative bias,
consistent with being on horizontal array now, droop ~2 deg
tc: ok, +/- 0.2 deg
w'w': ok, +/- 0.01 m^2/s^2 (30 min avg for second moments)
u*: ok, +/- 2 cm/s
sigma_w/u*: ok (1.3 at night)
w'tc': ok, +/- 0.02 m/s degC
tc'tc': ok, +/- 0.05 degC^2
Downwind Upper (hts=4.3): [,select.t]
------------------------
Has been running since mid 19 Jul. when set into configuration #2
diag: ok
samples.sonic: ok
spd: ok, +/- 10 cm/s
dir: ok, +/- 2 deg; more consistent now that on the horiz array, 6t at one
extreme
w: ok, +/- 5 cm/s
tc: ok, +/- 0.2 deg
w'w': ok, +/- 0.01 m^2/s^2 (30 min avg for second moments)
u*: ok, +/- 2 cm/s
sigma_w/u*: ok (1.3 at night)
w'tc': ok, +/- 0.005 m/s degC
tc'tc': ok, +/- 0.05 degC^2
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