AHATS daily status 7/03/08
Staff: Maclean, Horst, Khoung, Brown
Summary: Gordon is working on the software to obtain calibrated fast pressure
data. An initial look at the frequency data suggests that the data from the
pressure sensor is too noisy. We are working on cleaning up the signal.
For more details, see the ahats logbook at
https://wiki.ucar.edu/display/ahatslogbook
Good wind direction: For the period 7/1 13:00 through 7/3 13:00, we have
28.33 hours of data periods of length 20 minutes or longer with
wind directions from 195-355 degrees. This includes 8 periods of length
greater than one hour and equates to good periods 59% of the time.
Sorted by stability, there are 14.5 hours of stable stratification
(<w'tc'> < 0) nad 13.75 hours of unstable stratification.
Profiles:
---------
spd: ok
dir: ok
w: ok
tc: ok
sigma_w/u*: ok (1.3 at night)
u*: ok
w'tc': ok
diag: ok
samples.sonic: ok
T: ok
RH: 4m may be low by less than 1% RH
P: okay
(+/- = ~1 std deviation)
Upwind (hts=3.5):
----------------
spd: ok, +/- 15 cm/s
dir: ok, +/- 5 deg
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, +/- 0.04 m/s
sigma_w/u*: ok (1.3 at night)
tc'tc': ok, +/- 0.06 degC^2
w'tc': ok, +/- 0.015 m/s degC
diag: ok
samples.sonic: ok
Lower (hts=3):
-------------
spd: ok, +/- 20 cm/s
dir: ok, +/- 5 deg
w: ok, +/- 6 cm/s
tc: ok, +/- 0.25 deg
w'w': ok, +/- 0.01 m^2/s^2 (30 min avg for second moments)
u*: ok, +/- 0.04 m/s
sigma_w/u*: ok (1.3 at night)
tc'tc': ok, +/- 0.1 degC ^2
w'tc': ok, +/- 0.02 m/s degC
diag: ok
samples.sonic: ok
Upper (hts=4):
-------------
spd: ok, +/- 16 cm/s
dir: ok, +/- 5 deg; 6t is about 6.5 degrees off from profile sonic
w: ok, +/- 5 cm/s
tc: ok, +/- 0.25 deg
w'w': ok, +/- 0.01 m^2/s^2 (30 min avg for second moments)
u*: ok, +/- 0.04 m/s
sigma_w/u*: ok (1.3 at night)
tc'tc': ok, +/- 0.1 degC ^2
u*: ok, +/- 0.04 m/s
w'tc': ok, +/- 0.02 m/s degC
diag: ok
samples.sonic: ok