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DATA NAMING
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Site: ACS (Asu Cemetery Site)
Met. Tower:
North 40.75315  West 111.84864 Height: 1410m
Trailer:
North 40.75301  West 111.84848 Height: 1410m
Balloon 1: (tether sondes #2, #3, #4)
North 40.75308  West 111.84905 Height: 1409m
Balloon 2: (tether sond #1, DustTrack and Streaker)
North 40.75245  West 111.84889 Height: 1409m

Three data sets are archived:
RAW DATA (/RawData):  unprocessed data from the instruments. In
some cases only file name informs about date/time stamp.

UNIFIED DATA (/Unified): raw data but with unified time stamp
included(date, time UTC), unified units (SI) and presentation
(time, Vx, Vy, Vz, T). Some modifications of the data format were
necessary for both sonic files.

AVERAGE (/Average): 5min averages for both sonic data and 5min
samples from Omega using DayOfYear (Julian Day) real number format
for the time stamp.

In additions some examples of data are plotted (see GRAPHS). These
preliminary plots are prepared in GIF and PostScript (eps) format.

DATA COLLECTED BY MET TOWER ARE:

1. Sonic 2 (Metec) at the top (13.87m)  (3DV2)
2. cup anemometer 2 at 7.26m (V2)
3. NTC thermistor 2 at 6.9m  (T2)
4. Sonic 1 (Applied Technology) at 4.5m  (3DV1)
5. Radiometers (IR out and solar in) at 3.2m (Rin, Rout)
6. cup anemometer 1 at 2.0m (V1)
7. NTC thermistor 1 at 1.8m (T1)

The radiometers are pointing approx. north-south outside the
tower.
The cup anemometers are about 65cm out of tower, direction south.
The termistors had small (20mm tube) shield during first 5 days
(Oct. 1 - 6).
On Oct. 6 afternoon new large aluminium shields (15cm) were
mounted.

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OM-220 data-logger: 5 min sampling of: T1, T2, V1, V2, Rout, XXX,
Rin
(xxx - is column with not used internal radiation data).
Raw data are collected in /Omega . Filename contains date and time
stamp for the data begins. There is no time stamp within the data
file. It is found assuming 5min samples.

/Unified data files containing time are named:  OYYYYMMDDHHMM.dat
/Average - the same data but DayofYear time are named:
N_ODDHHMM.DWD

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Sonic anemometers collect data at 10Hz:
First sonic, also called old sonic, (Applied Technology, sampling
10Hz, data collected at 4.5m. Raw data are in /ATSa . Filename
contains date and time stamp for the data begins. There is no time
stamp within the data file. It is found assuming 0.1s samples.

/Unified files are: AYYYYMMDDHHMM.dat
/Average are named: onsstat2000_MMDDHHMM.dat

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Second sonic, also called new sonic, (Metec GmbH), sampling 10Hz,
at 13.87m
Raw data are in /MetecSa. Filename contains date and time stamp
for the data begins. The Metec software generates new file every 5
minutes, changing its name according to the time stamp. There is
time stamp within the data file too.

The Unified data collected in files: MYYYYMMDDHHMM.dat
Data in /Average are named: nnsstat2000_MMDDHHMM.dat

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Dust tracker data from the roof of the trailer (2.81m):
Raw data are in /Dust .
Filename contains date and time stamp for the data begins. There
is time stamp within the data file too. Filename is:
DRMMDDHHMM.TXT

Dust tracker on the balloon2:
Raw data are in /Dust. Filename contains date and time stamp for
the data begins. There is time stamp within the data file too.
Files are named as: DBMMDDHHMM.txt
Headers of the files give more information about balloon flight
and
experimental conditions.


================
Tether sondes data (vel, T, Rh, dir ) are collected in tether
directory
Raw files are stored in /Tether . They have format
MMDDHHmm.dat  (MM=month, DD=day, HH=hour, mm=minute).
Some readme files located there give more details.

3 tether sonds are flying on balloon 1.
Balloon2 was usually equipped with the sond #1 in addition to the
aerosol instruments to obtain correct height.

In most cases the raw data file contains 4 sonds information,
one after another.

The flight data is stored in a number of files.
Interpretation of the file name is as follows:

MMDDHHmm.dat  (MM=month, DD=day, HH=hour, mm=minute)

For example: file <10031059.dat> means that data were taken
Oct 03 at 10:59 UTC  (time of the begin of data acquisition)


The flight file is stored as an ASCII file as it is acquired in
the real time. The structure of this data is (example):

SONDE   ALT  E.TIME  PRESS  TEMP  RH   SPEED   DIR  B.VOLT  TIME
  #      m     sec     mb     C    %     mps    deg   volts
7J0350  354  589.04  975.45 18.00 27.17  2.7   257.9  8.990
17:39:02.54
7L0364  347  592.34  976.23 18.24 26.83  1.7   266.5  9.070
17:39:05.83

where:
ALT is the altitude of sensor above sea level (m). It is derived
from pressure sensor:
     Z1 - Z2 = (RT/mg)(lnP1 - lnP2);
E.TIME is the elapsed time (sec); It is reliable time stamp.
PRESS is the air pressure at the measurement height (mb);
TEMP is temperature of air (C);
RH is the relative humidity of air (%);
SPEED is the wind speed (m/s);
DIR is the wind direction (deg);
B.VOLT is the battery voltage (Volts). Generally, a sonde stops
to transmit signal when battery voltage drops below about 6.5 V;
TIME: real time of the sample (HH:mm:ss.ss) (UTC) In some cases
this time stamp seems to be corrupted (?!). Check it always with
the file name and correct if necessary. Sonde #1 stopped to
transmit wind speed after first day (Oct.1).

Nov. 11, 2000
T.K
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