BOREAS RSS-17 Dielectric Constant Profile Measurements

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
TREE
TREE_DIAMETER
PROBE_DEPTH
MEAN_DIELECTRIC_CONSTNT_REAL
MEAN_DIELECTRIC_CONSTNT_IMGNRY
CRTFCN_CODE
REVISION_DATE

7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files on the CD-ROM 
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.
TREE                           The individual tree from which measurements were
                               taken.
TREE_DIAMETER                  The diameter of the tree measured near the probe
                               insertion point.
PROBE_DEPTH                    The depth of the sensor probe into the tree 
                               trunk.
MEAN_DIELECTRIC_CONSTNT_REAL   The real portion of the relative dielectric 
                               constant, determined through application of a 
                               calibration equation applied to the reflection 
                               coefficient measured by the probe.
MEAN_DIELECTRIC_CONSTNT_IMGNRY The imaginary portion of the relative dielectric
                               constant, determined through application of a 
                               calibration equation applied to the reflection 
                               coefficient measured by the probe.
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 on the CD-
ROM are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
TREE                           [none]
TREE_DIAMETER                  [millimeters]
PROBE_DEPTH                    [millimeters]
MEAN_DIELECTRIC_CONSTNT_REAL   [unitless]
MEAN_DIELECTRIC_CONSTNT_IMGNRY [unitless]
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 the CD-ROM 
are:
         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS Staff]
SUB_SITE                       [Assigned by BORIS Staff]
DATE_OBS                       [RSS-17 team]
TIME_OBS                       [Hand-held calculator]
TREE                           [RSS-17 team]
TREE_DIAMETER                  [RSS-17 team]
PROBE_DEPTH                    [Caliper]
MEAN_DIELECTRIC_CONSTNT_REAL   [Dielectric probe]
MEAN_DIELECTRIC_CONSTNT_IMGNRY [Dielectric probe]
CRTFCN_CODE                    [Assigned by BORIS Staff]
REVISION_DATE                  [Assigned by BORIS Staff]

7.3.5 Data Range

The following table gives information about the parameter values found in the 
data files on the CD-ROM.

                     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-YJP-FLXTR  None    None   None    None
SUB_SITE             RSS17-DIE01    RSS17-DIE01    None    None   None    None
DATE_OBS             19-APR-1994    28-APR-1994    None    None   None    None
TIME_OBS             1703           2345           None    None   None    None
TREE                 A              C              None    None   None    None
TREE_DIAMETER        33             216            None    None   None    None
PROBE_DEPTH          0              99             None    None   None    None
MEAN_DIELECTRIC_     1.649          15.74          None    None   None    None
CONSTNT_REAL
MEAN_DIELECTRIC_     .164           6.616          None    None   None    None
CONSTNT_IMGNRY
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        17-SEP-1998    17-SEP-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

SITE_NAME,SUB_SITE,DATE_OBS,TIME_OBS,TREE,TREE_DIAMETER,PROBE_DEPTH,
MEAN_DIELECTRIC_CONSTNT_REAL,MEAN_DIELECTRIC_CONSTNT_IMGNRY,CRTFCN_CODE,
REVISION_DATE
'NSA-OBS-FLXTR','RSS17-DIE01',28-APR-1994,1703,'A',116,0.0,1.714,.242,'CPI',
17-SEP-1998
'NSA-OBS-FLXTR','RSS17-DIE01',28-APR-1994,1705,'A',116,3.0,8.367,5.034,'CPI',
17-SEP-1998
