DIRECTION AND AZIMUTH OBSERVATION RECORDS

These records are used to establish a direction or an azimuth observation.

Sample direction and azimuth records

      COLUMN    CONTENT

        1-2     Blank
          3     Code    1 :  direction
                        3 :  azimuth
        4-6     Type used to identify the record with
                       51 :  a SIGMA-DIRECTION set
                       53 :  a SIGMA-AZIMUTH group 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     Azimuth origin indicator (for azimuths only)
                        North : blank, N, +
                        South : S, -
       56-58    Observation degrees
       59-61    Observation minutes    
       62-70    Observation seconds
       71-80    Standard deviation of the observation in seconds
                (Used if the type does not match the sigma type on the previous code 51 or
                code 53 record)