BOREAS Level-0 ER-2 Navigation Data

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the inventory listing file are:

         Column Name
------------------------------
SPATIAL_COVERAGE
DATE_OBS
START_TIME
END_TIME
ER2_MISSION_ID
CRTFCN_CODE

7.3.2 Variable Description/Definition

The parameters in the inventory listing are:

         Column Name                             Description
------------------------------ ------------------------------------------------
SPATIAL_COVERAGE               The general term used to denote the spatial area
                               over which the data were collected.
DATE_OBS                       The date on which the data were collected.
START_TIME                     The starting Greenwich Mean Time (GMT) for the 
                               data collected.
END_TIME                       The ending Greenwich Mean Time (GMT) for the 
                               data collected.
ER2_MISSION_ID                 The mission identifier assigned to the ER2 missi
                               mission in the form of YY-DDD where YY is the last 
                               two digits of the fiscal year, and DDD is the 
                               deployment number. An example would be 94-120.
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).

7.3.3 Unit of Measurement

The measurement units for the parameters contained in the inventory listing file 
are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SPATIAL_COVERAGE               [none]
DATE_OBS                       [DD-MON-YYYY]
START_TIME                     [HHMM GMT]
END_TIME                       [HHMM GMT]
ER2_MISSION_ID                 [none]
CRTFCN_CODE                    [none]

7.3.4 Data Source

The source of the parameter values contained in the inventory listing file are:

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SPATIAL_COVERAGE               [Constant software parameter value]
DATE_OBS                       [Navigation data files]
START_TIME                     [Navigation data files]
END_TIME                       [Navigation data files]
ER2_MISSION_ID                 [ER2 mission information]
CRTFCN_CODE                    [Constant data base value]
 
7.3.5 Data Range

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

                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SPATIAL_COVERAGE     N/A            N/A            None    None   None    None
DATE_OBS             19-APR-1994    17-SEP-1994    None    None   None    None
START_TIME           1310           1630           None    None   None    None
END_TIME             1920           2215           None    None   None    None
ER2_MISSION_ID       94-079         94-143         None    None   None    None
CRTFCN_CODE          PRE            PRE            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

SPATIAL_COVERAGE,DATE_OBS,START_TIME,END_TIME,ER2_MISSION_ID,CRTFCN_CODE
'NSA',20-APR-1994,1555,2155,'94-080','PRE'
'NSA',28-APR-1994,1445,2050,'94-082','PRE'