README.txt
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1) Author and/or source of the data.
For information please contact:
Dr. David R. Miller
Department of Natural Resources Management and Engineering
W.B.Young Building Room 305
University of Connecticut
1376 Storrs Road, U-4087
Storrs, CT 06269-4087
dmiller@canr.cag.uconn.edu
Voice: 860.486.0142
Fax: 860.486.5408
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2) Complete description of the sensors used in the data collection.
The 5m tower was equipped with two levels of instruments oriented to the east.
The tower was located 15m E of the Main Tower.
Time series data collected is as follows (raw data = approx. 1.1 Gbyte/day):
October 1 to 31, 1999,
5.0m - [ 20 Hz ] - Cambell Scientific (CSAT3) sonic anemometer.
[ 200 Hz ] - TSI (model 1294-20) triple hot film anemometer.
[ 200 Hz ] - TSI (model 1210) single film anemometer used
as a temperature sensor.
[ 1 Hz ] - Pneumatic sheath system for hot film anemometer.
October 1 to ??, 1999, {this level moved to 0.5m for the rest of the experiment}
1.5m - [ 20 Hz ] - Cambell Scientific (CSAT3) sonic anemometer.
[ 200 Hz ] - TSI (model 1294-20) triple hot film anemometer.
[ 200 Hz ] - TSI (model 1210) single film anemometer used
as a temperature sensor.
[ 1 Hz ] - Pneumatic sheath system for hot film anemometer.
October ?? to 31, 1999,
0.5m - [ 20 Hz ] - Cambell Scientific (CSAT3) sonic anemometer.
[ 200 Hz ] - TSI (model 1294-20) triple hot film anemometer.
[ 200 Hz ] - TSI (model 1210) single film anemometers used
as a temperature sensor.
[ 1 Hz ] - Pneumatic sheath system for hot film anemometer.
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3) Complete description of any derived parameters contained in the dataset.
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4) Specific definition of the sample time period (hourly, continuous, etc.)
for each variable contained in the dataset.
The sonic anemometers were sampled at 20Hz, the triple hot film and single
cold film anemometers were sampled at 200Hz. The sheaths were sampled at 1Hz.
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5) Specify the units for each measured or derived parameter.
u1 measured u (meters per sec)
u2 horizontally rotated u (meters per sec)
u3 vertically rotated u (meters per sec)
v1 measured v (meters per sec)
v2 horizontally rotated u (meters per sec) v2 = v3 = 0
v3 vertically rotated u (meters per sec) v2 = v3 = 0
w1 measured w (meters per sec) w1 = w2
w2 horizontally rotated u (meters per sec) w1 = w2
w3 vertically rotated u (meters per sec)
T temperature (degrees Celcius)
sigU1 stdev of u1 (meters per sec)
sigU2 stdev of u2 (meters per sec)
sigU3 stdev of u3 (meters per sec)
sigV1 stdev of v1 (meters per sec)
sigV2 stdev of v2 (meters per sec) sigv2 = sigv3
sigV3 stdev of v3 (meters per sec) sigv2 = sigv3
sigW1 stdev of w1 (meters per sec) sigw1 = sigw2
sigW2 stdev of w2 (meters per sec) sigw1 = sigw2
sigW3 stdev of w3 (meters per sec)
sigT stdev of T (degrees Celcius)
u1* friction velocity with NO vertical rotation (meters per sec) u1* = u2*
u2* friction velocity with NO vertical rotation (meters per sec) u1* = u2*
u3* friction velocity WITH vertical rotation (meters per sec)
u1*2 u1* squared (meters squared per sec squared) u1*2 = u2*2
u2*2 u2* squared (meters squared per sec squared) u1*2 = u2*2
u3*2 u3* squared (meters squared per sec squared)
u1'w1' (meters squared per sec squared)
u2'w2' (meters squared per sec squared)
u3'w3' (meters squared per sec squared)
v1'w1' (meters squared per sec squared)
v2'w2' (meters squared per sec squared)
v3'w3' (meters squared per sec squared)
w1'T' (Watts per meter squared)
w2'T' (Watts per meter squared)
w3'T' (Watts per meter squared)
q (degrees from u-axis to v-axis)
f (degrees from U-axis to w-axis)
TKE/m (meters squared per sec squared)
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6) Document the version number/release date.
August 17, 2001
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8) A description of the quality control done on the data.
See the ???.doc file which contains a list of known problems within the dataset.
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The file naming convention is as follows:
All times are Universal Coordinated Time (UTC).
The data format is as follows:
u1 u2 u3 v1 v2 v3 w1 w2 w3 T sigU1 sigU2 sigU3 sigV1 sigV2 sigV3 sigW1 sigW2 sigW3 sigT u1* u2* u3* u1*2 u2*2 u3*2 u1'w1' u2'w2' u3'w3' v1'w1' v2'w2' v3'w3' w1'T' w2'T' w3'T' q f TKE/m
Filename Sample size (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (degC) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (oC) (m/s) (m/s) (m/s) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (m2/s2) (W/m2) (W/m2) (W/m2) (deg) (deg) (m2/s2)
where the numbers 1-3 represent no rotation (u1), rotated in u-v plane (u2), and
rotated in u-v and U-w planes (u3). SigU1 is the standard deviation of (u1).
q and f represent the angles of horizontal and vertical rotations in degrees,
TKE is turbulent kinetic energy, and m is mass.
The sample size indicates the averaging length of the data and is specific
to the 20Hz and 200Hz data. The raw data for these periods is avaliable through
David Miller (see contact info above).