DISTANCE OBSERVATION RECORDS

This record is used to establish a distance observation.

Sample records

      COLUMN    CONTENT

        1-2     Blank
          3     Code : 2
        4-6     Type used to identify the record with a SIGMA-DISTANCE
                record
       7-15     Number used to identify the observation as
                originating from the station as identified in the
                STAtion DATA file
       16-30    Originating station name
       31-39    Number used to identify the observation as targeting
                on the station as identified in the STATION DATA file
       40-54    Targeting station name
          55    Sea level indicator
                        Blank:  sea level distance (GHOST reduces it to a
                                marker-to-marker distance using the
                                elevations provided on the coordinate
                                records)
                        Non blank: marker-to-marker distance
       56-70   Distance observation in meters
       71-80   Standard deviation of the observation in centimeters
                (Used if the type does not match the previous sigma type
                from the code 52 record)