BOREAS HYD-01 Under Canopy Precipitation Data

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files are:

1994 Data

Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
TUBE_ROD_ID
PRECIP_UNDER_CANOPY
CRTFCN_CODE
REVISION_DATE

1995 to 1997 Data

Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
PRECIP_UNDER_CANOPY_1
PRECIP_UNDER_CANOPY_2
MEAN_PRECIP_UNDER_CANOPY
CRTFCN_CODE
REVISION_DATE


7.3.2 Variable Description/Definition

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

1994 Data

         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.
TUBE_ROD_ID                    The identifier for the Tube or Rod at which the
                               data was collected.
PRECIP_UNDER_CANOPY            The under canopy precipitation.
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.


1995 to 1997 Data

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.
PRECIP_UNDER_CANOPY_1          The under canopy precipitation measured at gauge
                               1.
PRECIP_UNDER_CANOPY_2          The under canopy precipitation measured at gauge
                               2.
MEAN_PRECIP_UNDER_CANOPY       The mean under canopy precipitation.
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:

1994 Data

Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
TUBE_ROD_ID                    [unitless]
PRECIP_UNDER_CANOPY            [millimeters]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]

1995 to 1997 Data

Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
PRECIP_UNDER_CANOPY_1          [millimeters]
PRECIP_UNDER_CANOPY_2          [millimeters]
MEAN_PRECIP_UNDER_CANOPY       [millimeters]
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:

1994 Data

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS]
SUB_SITE                       [Assigned by BORIS]
DATE_OBS                       [Supplied by Investigator]
TIME_OBS                       [Supplied by Investigator]
TUBE_ROD_ID                    [Supplied by Investigator]
PRECIP_UNDER_CANOPY            [Supplied by Investigator]
CRTFCN_CODE                    [Assigned by BORIS]
REVISION_DATE                  [Assigned by BORIS]

1995 to 1997 Data

Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS]
SUB_SITE                       [Assigned by BORIS]
DATE_OBS                       [Supplied by Investigator]
TIME_OBS                       [Supplied by Investigator]
PRECIP_UNDER_CANOPY_1          [Supplied by Investigator]
PRECIP_UNDER_CANOPY_2          [Supplied by Investigator]
MEAN_PRECIP_UNDER_CANOPY       [Supplied by Investigator]
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.

1994 Data
                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            NSA-OJP-FLXTR  SSA-YJP-FLXTR  None    None   None    None
SUB_SITE             HYD01-UCP01    HYD01-UCP07    None    None   None    None
DATE_OBS             23-MAY-1994    15-SEP-1994    None    None   None    None
TIME_OBS             0              0              None    None   None    None
TUBE_ROD_ID          1              7              None    None   None    None
PRECIP_UNDER_CANOPY  -9999          130            None    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        05-MAY-1995    05-MAY-1995    None    None   None    None
--------------------------------------------------------------------------------


1995 to 1997 Data
                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            NSA-OBS-FLXTR  SSA-9OA-FLXTR  None    None   None    None
SUB_SITE             HYD01-UCP01    HYD01-UCP08    None    None   None    None
DATE_OBS             14-JUL-1995    24-JUN-1997    None    None   None    None
TIME_OBS             0              2300           None    None   None    None
PRECIP_UNDER_CANOPY_ 0              21.08          None    None   None    None
1
PRECIP_UNDER_CANOPY_ 0              18.03          None    None   None    Blank
2
MEAN_PRECIP_UNDER_   .05            18.67          None    None   None    Blank
CANOPY
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        30-OCT-1998    30-OCT-1998    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

1994 Data

SITE_NAME,SUB_SITE,DATE_OBS,TIME_OBS,PRECIP_UNDER_CANOPY_1,
PRECIP_UNDER_CANOPY_2,MEAN_PRECIP_UNDER_CANOPY,CRTFCN_CODE,REVISION_DATE
'NSA-OBS-FLXTR','HYD01-UCP01',14-JUL-1995,2300,2.03,,,'CPI',30-OCT-1998
'NSA-OBS-FLXTR','HYD01-UCP01',15-JUL-1995,1100,.25,,,'CPI',30-OCT-1998

1995 to 1997 Data

SITE_NAME,SUB_SITE,DATE_OBS,TIME_OBS,TUBE_ROD_ID,PRECIP_UNDER_CANOPY,
CRTFCN_CODE,REVISION_DATE
'NSA-OJP-FLXTR','HYD01-UCP02',15-JUN-1994,0,'2',21.5,'CPI',05-MAY-1995
'NSA-OJP-FLXTR','HYD01-UCP02',20-JUL-1994,0,'2',10.0,'CPI',05-MAY-1995
