*2014/03/13 13:41:29.83
*IOS HEADER VERSION 1.10 2011/10/26 2011/10/26

*FILE
    START TIME          : GMT 1980/08/01 21:00:00.000
    END TIME            : GMT 1980/08/26 22:00:00.000
    TIME INCREMENT      : 0 1 0 0 0  ! (day hr min sec ms)
    NUMBER OF RECORDS   : 602
    DATA DESCRIPTION    : CurrentMeter
    FILE TYPE           : ASCII
    FORMAT              : (f7.3,f8.2)
    DATA TYPE           : REAL*4
    NUMBER OF CHANNELS  : 2

    $TABLE: CHANNELS
    ! No Name                 Units     Minimum        Maximum
    !--- -------------------- --------- -------------- --------------
       1 Speed                m/s       0.5E-02        0.412
       2 Direction:Geog(to)   degrees   5              360
    $END

    $TABLE: CHANNEL DETAIL
    ! No  Pad     Start  Width  Format  Type  Decimal_Places
    !---  ------  -----  -----  ------  ----  --------------
       1  99.999  ' '        7  F       ' '     3
       2  999.99  ' '        8  F       ' '     2
    $END
    $REMARKS
        Original file name:
    $END

*ADMINISTRATION
    AGENCY              : CANMAR
    PROJECT             : Beaufort Sea Drilling 1980

*LOCATION
    GEOGRAPHIC AREA     : Beaufort Sea
    STATION             : Orvilruk
    LATITUDE            :  70  20.40000 N  ! (deg min)
    LONGITUDE           : 136  39.00000 W  ! (deg min)
    WATER DEPTH         : 56

*DEPLOYMENT
    MISSION             : n/a
    TYPE                : Ship, Explorer 4       | custom item

*INSTRUMENT
    TYPE                : HydroProducts Current Meter
    MODEL               : 950
    DEPTH               : 12

    $TABLE: SENSORS
    !   Name       Abs Depth       Serial No
    !   ---------  --------------  ----------
        Compass    12              ' '
        Speed      12              ' '
    $END
    $REMARKS
        Instrument depth in metres.
    $END

*HISTORY

    $TABLE: PROGRAMS
    !   Name                    Vers   Date       Time     Recs In   Recs Out
    !   ----------------------- ------ ---------- -------- --------- ---------
        CLEAN                   1.1    1996/01/08 13:12:13       602       602
        CLEAN                   1.1    1996/01/08 13:16:37       602       602
        REMOVECH                2.0    1996/01/08 14:09:38       602       602
        CHANGE_CM_CHANNEL_NAMES 1.0    2013/12/12 11:42:28       602       602
        CHANGE_HEADER_INFO      1.0    2014/03/13 13:41:29       602       602
    $END
    $REMARKS
        -The following CLEAN parameters were used.
         Reset #RECS, MIN & MAX values in header.
        -The following CLEAN parameters were used.
         Reset #RECS, MIN & MAX values in header.
        -The following CHANNEL(S) were removed from file.
         temperature
    $END

*COMMENTS
        The 1980-1985 Canmar current meter data were extracted from GF3 tape
        #ASLGF3183001 written by R. Birch of Arctic Sciences Ltd.  These
        current meter data have been edited, checked and processed, under a
        contract to COGLA (Birch, 1988. Current meter and wind data collected
        at CANMAR drillships 1980-1986. By Arctic Sciences Ltd., Sidney, B.C.,
        287 p.).
        The following documentation was extracted from the GF3 tape.

    0  ***  CURRENT METER METHODS - 1980  ***                                    242
    0                                                                            243
    0  NEARLY ALL THE CURRENT DATA FOR 1980 WERE OBTAINED USING HYDROPRODUCT     244
    0  MODEL 950 CURRENT METERS.  AT EACH SITE A HYDROPRODUCT METER WAS          245
    0  SUSPENDED FROM THE DRILLSHIP AT A DEPTH OF 12 METERS. EACH INSTRUMENT     246
    0  PROVIDED DIRECT READOUT AT SURFACE OF THE CURRENTS, WHICH WERE LOGGED     247
    0  HOURLY.  TORSIONALLY RIGID HYDRAULIC HOSE WAS USED SO THAT THE            248
    0  ORIENTATION OF THE INSTRUMENT COULD BE FIXED AND DETERMINED AT THE        249
    0  SURFACE. THE DIRECTION OF THE VANE WAS THEN MEASURED RELATIVE TO THE      250
    0  'IMMOBILE' INSTRUMENT CASING. THUS THE MEASUREMENT OF CURRENT DIRECTION   251
    0  WAS NOT DEPENDENT ON A COMPASS WITHIN THE INSTRUMENT, WHICH WOULD NOT BE  252
    0  RELIABLE DUE TO THE PROXIMITY OF THE SHIP.                                253
    0                                                                            254
    0  THE DIRECTIONAL ACCURACY OF THE MEASURED CURRENTS DEPENDS ON HOW WELL THE 255
    0  INSTRUMENTS WERE ORIENTED FROM SURFACE.  EVEN IF THIS WAS ACCOMPLISHED    256
    0  WITH FASTIDIOUS CARE, THE TRUE REFERENCE BEARING MAY HAVE BEEN IN ERROR   257
    0  DUE TO DIFFERENCES IN THE CHART AND ACTUAL MAGNETIC DEVIATION VALUES. THE 258
    0  LOCAL MAGNETIC DEVIATION, THE DIFFERENCE BETWEEN TRUE AND MAGNETIC NORTH, 259
    0  HAS BEEN SHOWN TO HAVE A DAILY RANGE ON THE ORDER OF 5 DEGREES, AND MAY   260
    0  DIFFER SIGNIFICANTLY FROM THAT SHOWN ON THE CHART (STEEN, PERS. COMM.).   261
    0                                                                            262
    0  DUE TO THESE FACTORS, IT IS BELIEVED THAT THE CURRENT DIRECTION DATA      263
    0  OBTAINED WITH THE HYDROPRODUCT METERS MAY BE IN ERROR BY AS MUCH AS 30    264
    0  DEGREES.                                                                  265
    0                                                                            266
    0  ERRORS MAY ALSO HAVE BEEN INTRODUCED DUE TO THE PRESENCE OF THE SHIP AND  267
    0  THE BLOWOUT PREVENTER (BOP).  THE EXPLORER DRILLSHIPS HAVE DRAFTS ON THE  268
    0  ORDER OF 6 TO 7 METERS (TABLE 2-1), AND THEIR EFFECT ON THE CURRENTS AT   269
    0  THE 12M INSTRUMENT DEPTH MAY HAVE BEEN SIGNIFICANT.  DRILLSHIPS WERE      270
    0  GENERALLY ORIENTED TO HEADINGS OF EITHER 300 OR 120 DEGREES, SO A         271
    0  PREFERENTIAL FLOW ALONG THIS AXIS MAY INDICATE INTERFERENCE FROM THE      272
    0  DRILLSHIP.  THE BOP AND WELLHEAD ON THE SEA FLOOR MAY ALSO ALTER THE FLOW 273
    0  PATTERN IN THE AREA OF THE DRILLSHIP.                                     274
    0                                                                            275
    0  MOTION OF THE DRILLSHIP IS TRANSFERRED TO THE CURRENT METERS DUE TO THE   276
    0  RIGID COUPLING. THIS WAS KNOWN TO HAVE RESULTED IN ERRONEOUS DATA         277
    0  PARTICLARLY WHEN SEAS WERE MOST ROUGH,  GENERALLY DURING LATE-SUMMER AND  278
    0  FALL.  IN 1980 HEAVY ICE HELPED KEEP THE SEAS RELATIVELY CALM AND THE     279
    0  SHIP MOTION WAS NOT SIGNIFICANT.                                          280
    0                                                                            281
    0  A MARSH MCBIRNEY ELECTROMAGNETIC CURRENT METER WAS DEPLOYED FOR A SHORT   282
    0  PERIOD AT THE ORVILRUK SITE USING THE SAME MOORING METHOD.                283

       November 11, 2003
       -----------------
       Longitude Hemisphere changed from East to West.
!--1--- ---2---
!Speed  Directi
!       on:    
!       Geog(  
!       to)    
!------ -------
*END OF HEADER
  0.103  260.00
  0.103  260.00
  0.103  260.00
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