BOREAS RSS-12 Automated Ground Sunphotometer Measurements in the SSA

7.3 Data Characteristics


7.3.1 Parameter/Variable


         Column Name
------------------------------
SITE_NAME
SUB_SITE
DATE_OBS
TIME_OBS
SOLAR_ZEN_ANG
AIRMASS
AEROSOL_OPT_THICK_380
AEROSOL_OPT_THICK_401
AEROSOL_OPT_THICK_440
AEROSOL_OPT_THICK_522
AEROSOL_OPT_THICK_608
AEROSOL_OPT_THICK_667
AEROSOL_OPT_THICK_779
AEROSOL_OPT_THICK_866
AEROSOL_OPT_THICK_1027
AEROSOL_OPT_THICK_UNCERT_380
AEROSOL_OPT_THICK_UNCERT_401
AEROSOL_OPT_THICK_UNCERT_440
AEROSOL_OPT_THICK_UNCERT_522
AEROSOL_OPT_THICK_UNCERT_608
AEROSOL_OPT_THICK_UNCERT_667
AEROSOL_OPT_THICK_UNCERT_779
AEROSOL_OPT_THICK_UNCERT_866
AEROSOL_OPT_THICK_UNCERT_1027
CRTFCN_CODE
REVISION_DATE



7.3.2 Variable Description/Definition


         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 
                               identifierfor 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.
SOLAR_ZEN_ANG                  The angle from the surface normal (straight up)
                               to the sun during the data collection.
AIRMASS                        The relative distance measurement of the 
                               atmosphere through which the radiance 
                               measurement is taken.
AEROSOL_OPT_THICK_380          The aerosol optical thickness measured at 0.380
                               micrometers.
AEROSOL_OPT_THICK_401          The aerosol optical thickness measured at 0.401
                               micrometers.
AEROSOL_OPT_THICK_440          The aerosol optical thickness measured between 
                               0.438 and 0.441 micrometers.
AEROSOL_OPT_THICK_522          The aerosol optical thickness measured at 0.522
                               micrometers.
AEROSOL_OPT_THICK_608          The aerosol optical thickness measured at 0.608
                               micrometers.
AEROSOL_OPT_THICK_667          The aerosol optical thickness measured at 0.667
                               micrometers.
AEROSOL_OPT_THICK_779          The aerosol optical thickness measured at 0.779
                               micrometers.
AEROSOL_OPT_THICK_866          The aerosol optical thickness measured at 0.866
                               micrometers.
AEROSOL_OPT_THICK_1027         The aerosol optical thickness measured at 1.027
                               micrometers.
AEROSOL_OPT_THICK_UNCERT_380   The uncertainty of the aerosol optical thickness
                               measured at 0.380 micrometers.
AEROSOL_OPT_THICK_UNCERT_401   The uncertainty of the aerosol optical thickness
                               measured at 0.401 micrometers.
AEROSOL_OPT_THICK_UNCERT_440   The uncertainty of the aerosol optical thickness
                               measured between 0.438 and 0.441 micrometers.
AEROSOL_OPT_THICK_UNCERT_522   The uncertainty of the aerosol optical thickness
                               measured at 0.522 micrometers.
AEROSOL_OPT_THICK_UNCERT_608   The uncertainty of the aerosol optical thickness
                               measured at 0.608 micrometers.
AEROSOL_OPT_THICK_UNCERT_667   The uncertainty of the aerosol optical thickness
                               measured at 0.667 micrometers.
AEROSOL_OPT_THICK_UNCERT_779   The uncertainty of the aerosol optical thickness
                               measured at 0.779 micrometers.
AEROSOL_OPT_THICK_UNCERT_866   The uncertainty of the aerosol optical thickness
                               measured at 0.866 micrometers.
AEROSOL_OPT_THICK_UNCERT_1027  The uncertainty of the aerosol optical thickness
                               measured at 1.027 micrometers.
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


         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
DATE_OBS                       [DD-MON-YYYY]
TIME_OBS                       [HHMM GMT]
SOLAR_ZEN_ANG                  [degrees]
AIRMASS                        [unitless]
AEROSOL_OPT_THICK_380          [unitless]
AEROSOL_OPT_THICK_401          [unitless]
AEROSOL_OPT_THICK_440          [unitless]
AEROSOL_OPT_THICK_522          [unitless]
AEROSOL_OPT_THICK_608          [unitless]
AEROSOL_OPT_THICK_667          [unitless]
AEROSOL_OPT_THICK_779          [unitless]
AEROSOL_OPT_THICK_866          [unitless]
AEROSOL_OPT_THICK_1027         [unitless]
AEROSOL_OPT_THICK_UNCERT_380   [unitless]
AEROSOL_OPT_THICK_UNCERT_401   [unitless]
AEROSOL_OPT_THICK_UNCERT_440   [unitless]
AEROSOL_OPT_THICK_UNCERT_522   [unitless]
AEROSOL_OPT_THICK_UNCERT_608   [unitless]
AEROSOL_OPT_THICK_UNCERT_667   [unitless]
AEROSOL_OPT_THICK_UNCERT_779   [unitless]
AEROSOL_OPT_THICK_UNCERT_866   [unitless]
AEROSOL_OPT_THICK_UNCERT_1027  [unitless]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]




7.3.4 Data Source


         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS]
SUB_SITE                       [Assigned by BORIS]
DATE_OBS                       [Watch/Controller]
TIME_OBS                       [Watch/Controller]
SOLAR_ZEN_ANG                  [Solar algorithm]
AIRMASS                        [Computed from solar elevation]
AEROSOL_OPT_THICK_380          [Reagan sunphotometer]
AEROSOL_OPT_THICK_401          [Reagan sunphotometer]
AEROSOL_OPT_THICK_440          [Reagan sunphotometer]
AEROSOL_OPT_THICK_522          [Reagan sunphotometer]
AEROSOL_OPT_THICK_608          [Reagan sunphotometer]
AEROSOL_OPT_THICK_667          [Reagan sunphotometer]
AEROSOL_OPT_THICK_779          [Reagan sunphotometer]
AEROSOL_OPT_THICK_866          [Reagan sunphotometer]
AEROSOL_OPT_THICK_1027         [Reagan sunphotometer]
AEROSOL_OPT_THICK_UNCERT_380   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_401   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_440   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_522   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_608   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_667   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_779   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_866   [Error propagation]
AEROSOL_OPT_THICK_UNCERT_1027  [Error propagation]
CRTFCN_CODE                    [Assigned by BORIS]
REVISION_DATE                  [Assigned by BORIS]




7.3.5  Data Range


                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            SSA-999-SBC01  SSA-999-SLH01  None    None   None    None
SUB_SITE             RSS12-SPH01    RSS12-SPH01    None    None   None    None
DATE_OBS             25-MAY-1994    19-SEP-1994    None    None   None    None
TIME_OBS             1142           2300           None    None   None    None
SOLAR_ZEN_ANG        30.67          87.31          None    None   None    None
AIRMASS              1.162          15.468         None    None   None    None
AEROSOL_OPT_THICK_   .026           6.749          None    None   None    None
380
AEROSOL_OPT_THICK_   .016           6.003          None    None   None    None
401
AEROSOL_OPT_THICK_   .017           5.501          None    None   None    None
440
AEROSOL_OPT_THICK_   .009           6.908          None    None   None    None
522
AEROSOL_OPT_THICK_   -.004          7.362          None    None   None    None
608
AEROSOL_OPT_THICK_   .008           6.413          None    None   None    None
667
AEROSOL_OPT_THICK_   .009           7.5            None    None   None    None
779
AEROSOL_OPT_THICK_   .002           7.452          None    None   None    None
866
AEROSOL_OPT_THICK_   .003           7.507          None    None   None    None
1027
AEROSOL_OPT_THICK_   .005           .83            None    None   None    None
UNCERT_380
AEROSOL_OPT_THICK_   .005           .324           None    None   None    None
UNCERT_401
AEROSOL_OPT_THICK_   .003           .138           None    None   None    None
UNCERT_440
AEROSOL_OPT_THICK_   .003           .716           None    None   None    None
UNCERT_522
AEROSOL_OPT_THICK_   .006           .86            None    None   None    None
UNCERT_608
AEROSOL_OPT_THICK_   .002           .253           None    None   None    None
UNCERT_667
AEROSOL_OPT_THICK_   .001           .86            None    None   None    None
UNCERT_779
AEROSOL_OPT_THICK_   .001           .864           None    None   None    None
UNCERT_866
AEROSOL_OPT_THICK_   .002           .86            None    None   None    None
UNCERT_1027
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        02-JAN-1997    02-JAN-1997    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,SOLAR_ZEN_ANG,AIRMASS,
AEROSOL_OPT_THICK_380,AEROSOL_OPT_THICK_401,AEROSOL_OPT_THICK_440,
AEROSOL_OPT_THICK_522,AEROSOL_OPT_THICK_608,AEROSOL_OPT_THICK_667,
AEROSOL_OPT_THICK_779,AEROSOL_OPT_THICK_866,AEROSOL_OPT_THICK_1027,
AEROSOL_OPT_THICK_UNCERT_380,AEROSOL_OPT_THICK_UNCERT_401,
AEROSOL_OPT_THICK_UNCERT_440,AEROSOL_OPT_THICK_UNCERT_522,
AEROSOL_OPT_THICK_UNCERT_608,AEROSOL_OPT_THICK_UNCERT_667,
AEROSOL_OPT_THICK_UNCERT_779,AEROSOL_OPT_THICK_UNCERT_866,
AEROSOL_OPT_THICK_UNCERT_1027,CRTFCN_CODE,REVISION_DATE
'SSA-999-SBC01','RSS12-SPH01',01-AUG-1994,1851,36.08,1.236,.329,.3,.269,.207,
.151,.14,.111,.084,.053,.011,.027,.017,.009,.02,.009,.008,.011,.02,'CPI',
02-JAN-1997
'SSA-999-SBC01','RSS12-SPH01',01-AUG-1994,1852,36.07,1.236,.319,.292,.263,.198,
.148,.132,.105,.079,.051,.011,.027,.017,.009,.02,.009,.008,.011,.02,'CPI',
02-JAN-1997
