BOREAS TF-02 SSA-OA Tethersonde Meteorological and Ozone Data

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files on the CD-ROM are:

         Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
HT_AGL
ATMOSPHERIC_PRESS
AIR_TEMP
REL_HUM
POTENTIAL_TEMP
WIND_SPEED
WIND_DIR
OZONE_CONC
CRTFCN_CODE
REVISION_DATE

7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files are:

         Column Name                             Description
------------------------------ ------------------------------------------------
SITE_NAME                      The identifier assigned to the site by BOREAS, in
                               the format SSS-TTT-CCCCC, where SSS identifies
                               the portion of the study area: NSA, SSA, REG, 
                               TRN, and TTT identifies the cover type for the 
                               site, 999 if unknown, and CCCCC is the identifier
                               for site, exactly what it means will vary with 
                               site type.
SUB_SITE                       The identifier assigned to the sub-site by BOREAS,
                               in the format GGGGG-IIIII, where GGGGG is the
                               group associated with the sub-site instrument,
                               e.g. HYD06 or STAFF, and IIIII is the identifier
                               for sub-site, often this will refer to an 
                               instrument.
DATE_OBS                       The date on which the data were collected.
TIME_OBS                       The Greenwich Mean Time (GMT) when the data were
                               collected.
HT_AGL                         The height above ground at which the measurements
                               were taken.
ATMOSPHERIC_PRESS              The atmospheric pressure.
AIR_TEMP                       The air temperature.
REL_HUM                        The calculated relative humidity.
POTENTIAL_TEMP                 The measured potential temperature.
WIND_SPEED                     The wind speed.
WIND_DIR                       The direction from which the wind was traveling,
                               increasing in a clockwise direction from north.
OZONE_CONC                     The ozone concentration.
CRTFCN_CODE                    The BOREAS certification level of the data.  
                               Examples are CPI (Checked by PI), CGR (Certified 
                               by Group), PRE (Preliminary), and CPI-??? (CPI but
                               questionable).
REVISION_DATE                  The most recent date when the information in the
                               referenced data base table record was revised.

7.3.3 Unit of Measurement

The measurement units for the parameters contained in the data files are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
HT_AGL                         [meters]
ATMOSPHERIC_PRESS              [kiloPascals]
AIR_TEMP                       [degrees Celsius]
REL_HUM                        [percent]
POTENTIAL_TEMP                 [degrees Kelvin]
WIND_SPEED                     [meters][second^-1]
WIND_DIR                       [degrees]
OZONE_CONC                     [parts per billion]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]

7.3.4 Data Source

The source of the parameter values contained in the data files on are:

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS.]
SUB_SITE                       [Assigned by BORIS.]
DATE_OBS                       [Supplied by Investigator.]
TIME_OBS                       [Supplied by Investigator.]
HT_AGL                         [measurement of cable]
ATMOSPHERIC_PRESS              [aneroid capacitance barometer]
AIR_TEMP                       [dry bulb thermistor]
REL_HUM                        [dry and wet bulb thermistors]
POTENTIAL_TEMP                 [dry and wet bulb thermistors]
WIND_SPEED                     [cup anemometer]
WIND_DIR                       [windvane]
OZONE_CONC                     [Mast-Brewer ozone sonde]
CRTFCN_CODE                    [Assigned by BORIS.]
REVISION_DATE                  [Assigned by BORIS.]

7.3.5  Data Range

The following table gives information about the parameter values found in
the data files.

                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            SSA-9OA-FLXTR  SSA-9OA-FLXTR  None    None   None    None
SUB_SITE             9TF02-TET01    9TF02-TET01    None    None   None    None
DATE_OBS             17-OCT-1993    09-AUG-1994    None    None   None    None
TIME_OBS             0              2359           None    None   None    None
HT_AGL               -839.6         324.17         -999    None   None    None
ATMOSPHERIC_PRESS    90.06          8888.888       -999    None   None    None
AIR_TEMP             -13.01         29.58          -999    None   None    None
REL_HUM              32.13          100            -999    None   None    None
POTENTIAL_TEMP       266.33         307.73         -999    None   None    None
WIND_SPEED           0              35.5           -999    None   None    None
WIND_DIR             .01            360            -999    None   None    None
OZONE_CONC           6.29           86.02          -999    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        04-AUG-1999    04-AUG-1999    None    None   None    None
--------------------------------------------------------------------------------
Minimum Data Value -- The minimum value found in the column.
Maximum Data Value -- The maximum value found in the column.
Missng Data Value  -- The value that indicates missing data. This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the attempt was unsuccessful.
Unrel Data Value   -- The value that indicates unreliable data.  This is used
                      to indicate an attempt was made to determine the
                      parameter value, but the value was deemed to be
                      unreliable by the analysis personnel.
Below Detect Limit -- The value that indicates parameter values below the
                      instruments detection limits.  This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the analysis personnel determined
                      that the parameter value was below the detection
                      limit of the instrumentation.
Data Not Cllctd    -- This value indicates that no attempt was made to
                      determine the parameter value.  This usually
                      indicates that BORIS combined several similar but
                      not identical data sets into the same data base table
                      but this particular science team did not
                      measure that parameter.

Blank -- Indicates that blank spaces are used to denote that type of value.
N/A   -- Indicates that the value is not applicable to the respective column.
None  -- Indicates that no values of that sort were found in the column.
--------------------------------------------------------------------------------

7.4 Sample Data Record

SITE_NAME,SUB_SITE,DATE_OBS,TIME_OBS,HT_AGL,ATMOSPHERIC_PRESS,AIR_TEMP,
REL_HUM,POTENTIAL_TEMP,WIND_SPEED,WIND_DIR,OZONE_CONC,CRTFCN_CODE,REVISION_DATE
'SSA-9OA-FLXTR','9TF02-TET01',17-OCT-1993,1751,1.49,93.68,6.42,63.27,284.84,
0.0,17.0,15.98,'CPI',04-AUG-1999
'SSA-9OA-FLXTR','9TF02-TET01',17-OCT-1993,1751,1.34,93.67,6.42,63.2,284.84,
.05,163.0,16.16,'CPI',04-AUG-1999
