BOREAS AFM-06 Boundary Layer Height Data

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files are:

         Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
INVERSION_HT
PARM_VALUE_FLAGS
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.
INVERSION_HT                   The measured inversion height.
PARM_VALUE_FLAGS               Contains values or codes that indicate special 
                               conditions for the data parameters.  See data set
                               documentation for descriptions of these codes.
                             Flag    Description
                               DR     Height was measured with rain was present
                                      during part of the hour.
                               DV     Height was measured with virga was present
                                      during part of the hour.
                               GC     Height was lost in ground clutter.
                               MI     Height was not measured
                               OK     Height was measure without incident.
                               PD     Height became poorly defined above 500
                                      meters.
                               RN     Height was not measured due rain.
                               VI     Height was not measured due to virga.
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]
INVERSION_HT                   [kilometers]
PARM_VALUE_FLAGS               [none]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]


7.3.4 Data Source

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

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS]
SUB_SITE                       [Assigned by BORIS]
DATE_OBS                       [Supplied by NOAA/ETL]
TIME_OBS                       [Supplied by NOAA/ETL]
INVERSION_HT                   [Supplied by NOAA/ETL]
PARM_VALUE_FLAGS               [Assigned by BORIS]
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-OJP-RDR01  SSA-OJP-RDR01  None    None   None    None
SUB_SITE             AFM-06-RDR01   AFM-06-RDR01   None    None   None    None
DATE_OBS             21-MAY-1994    20-SEP-1994    None    None   None    None
TIME_OBS             0              2300           None    None   None    None
INVERSE_HT           0              3.8            -999    None   None    None
PARM_VALUE_FLAGS     N/A            N/A            None    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        16-AUG-1996    16-AUG-1996    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,INVERSION_HT,PARM_VALUE_FLAGS,CRTFCN_CODE,
REVISION_DATE
'SSA-OJP-RDR01','AFM06-RDR01',21-MAY-1994,0,-999.0,'MI','CPI',16-AUG-1996
'SSA-OJP-RDR01','AFM06-RDR01',21-MAY-1994,100,-999.0,'RN','CPI',16-AUG-1996
