netcdf ocean-time-series/Stellwagen/DIAMONDSHOALS/8558fan_raw.cdf {
  dimensions:
    time = UNLIMITED;   // (245 currently)
    scan = 4644;
    points = 500;
  variables:
    int time(time=245);
      :units = "EPIC Julian Day";
      :type = "EVEN";
      :epic_code = 624S; // short

    int time2(time=245);
      :units = "msec since 0:00 GMT";
      :type = "EVEN";
      :epic_code = 624S; // short

    short scan(scan=4644);
      :units = "scan number";
      :type = "EVEN";

    short points(points=500);
      :units = "number of points";
      :type = "EVEN";

    float headangle(scan=4644);
      :long_name = "angle of xducer head during scan";
      :units = "degrees relative to head orientation";
      :valid_range = -180.0f, 180.0f; // float
      :_FillValue = 1.0E35f; // float
      :note1 = "headangle is computed from head_pos";

    short profile_range(time=245, scan=4644);
      :long_name = "first value above threshold";
      :units = "cm";
      :valid_range = 0S, 2048S; // short
      :_FillValue = -32767S; // short
      :note1 = "profile_range is returned in each scan header: combined into a vector";
      :note2 = "var_name matches Imagenex doc";

    short head_pos(time=245, scan=4644);
      :long_name = "Head position during scan";
      :units = "numeric location";
      :valid_range = 0S, 5000S; // short
      :_FillValue = -32767S; // short
      :note1 = "head_pos is returned in each scan header: combined into a vector";
      :note2 = "angle=deg/step*(head_pos-1400)";

    short raw_image(time=245, points=500, scan=4644);
      :long_name = "sonar return echo intensity";
      :units = "?";
      :valid_range = 0S, 252S; // short
      :sensor_type = "Imagenex Model 881 Digital tilt adjust imaging sonar";
      :_FillValue = -32767S; // short
      :scale_factor = 1S; // short
      :note1 = "raw image is matrix of return amplitudes as returned by logger";

    short nDataBytes(scan=4644);
      :long_name = "number of data bytes/scan";
      :units = "count";
      :valid_range = 0S, 550S; // short
      :_FillValue = -32767S; // short
      :note1 = "nDataBytes is returned in each scan header: combined into a vector";
      :note2 = "var_name matches Imagenex doc";

  // global attributes:
  :CREATION_DATE = "06-Jul-2009 11:46:26";
  :DATA_TYPE = "TIME";
  :DATA_SUBTYPE = "MOORED";
  :DATA_ORIGIN = "USGS WHSC Sed Trans Group";
  :EXPERIMENT = "Carolinas Coastal Change Processes Project";
  :PROJECT = "USGS Coastal Marine Geology Program";
  :MOORING = "855";
  :DELTA_T = "21600 sec";
  :COMPOSITE = 0; // int
  :DATA_CMNT = " ";
  :POS_CONST = 0; // int
  :DEPTH_CONST = 0; // int
  :WATER_MASS = "?";
  :DESCRIPT = " ";
  :DRIFTER = 0; // int
  :history = "Sonar data written to NetCDF by mkrawcdf, SVN $Revision: 1515 $, using Matlab 7.6.0.324 (R2008a); Sonar data downloaded from instrument";
  :start_time = "13-Jan-2009 01:56:00";
  :stop_time = "14-Mar-2009 14:56:00";
  :latitude = "35.1783";
  :longitude = "-75.423355";
  :magnetic_variation = "-10.7833";
  :INST_TYPE = "Imagenex Model 881 Digital tilt adjust imaging sonar";
  :Conventions = "PMEL/EPIC";
  :SciPi = "J.C. Warner";
  :DESCRIPTION = "North site with two tripods ";
  :COORD_SYSTEM = "GEOGRAPHIC";
  :WATER_DEPTH = "14.7828";
  :Deployment_date = "12-Jan-2009";
  :Recovery_date = "10-May-2009";
  :metadata_author = "Ellyn Montgomery, USGS";
  :SonartoAnimate = "fan";
  :Height = 0.63f; // float
  :FirstSonarDay = "12-Jan-2009";
  :LastSonarDay = "14-Mar-2009";
  :RootDataDir = "C:\\home\\data\\processing\\Hatteras09\\855NorthMinipod\\855sonar\\im";
  :sweeps = 2.0f; // float
  :datayear = 2009.0f; // float
  :VAR_DESC = "points:scans:head_pos:Headangle:nDataBytes:profile_range:raw_image";
  :HeadID = 16.0; // double
  :Range = 5.0; // double
  :RevHold = "Reverse Step Direction";
  :MasterSlave = "Send Data Slave Mode";
  :StartGain = 16.0; // double
  :LOGF = 20.0; // double
  :Absorption = 0.06; // double
  :TrainAngle = 0.0; // double
  :SectorWidth = 348.0; // double
  :StepSize = 0.15000000000000568; // double
  :PulseLength = 10.0; // double
  :DataPoints = 500.0; // double
  :DataBits = 8.0; // double
  :UpBaud = 6.0; // double
  :Profile = "OFF";
  :Calibrate = "Calibrate";
  :SwitchDelay = 2.0; // double
  :RangeOffset = 0.0; // double
  :StepDirection = 0.0; // double
  :MoveRelative = 0.0; // double
  :HeadType = "IGX";
  :NDataBytes = 500.0; // double
  :NReturnBytes = 513.0; // double
  :NOTE = "vector variables combined from scan headers; names match Imagenex documentation of headers";
  :OperatingFrequency = "1330 kHz";
}