Note: Many items listed are not always present, depending on how the data
file was generated.  The items with an asterisk (*) are the most important
ones (to satisfy the demands of the plotter "PLOVR.EXE")!

   Word                               Word
   No.       Description              No.          Description

   *1   Record number                   21   Beginning track (3M cassette)
   *2   Channel number                  22   Beginning block (3M cassette)
   *3   Mirror position                 23   Beginning time (HHMMSS)
           0 = earth                    24   Current time (HHMMSS)
           4 = hot blackbody           +25   Quality flag
           8 = cold blackbody                   1 = ifgm,ok
    4   Scan direction (1 or 2)                 2 = spectrum,ok
    5   Mirror alignment flag                  <0 = rejected
    6   Data buffer overflow flag      +26   Data conversion type
  # 7   Number of unknown records               1:I*2, 2:I*4, 3:R*4
  # 8   Number of points in ifgm.      +27   ZPD word number (in ifgm)
  # 9   Beginning record number         28   Time correction (seconds)
        (raw data rec.no. for           29   Apodization indicator
         start of ifgm.)                        (0=none)
  #10   ZPD rec.no. (raw data)          30   No. ifgm. points used if FFT
  #11   Time (seconds)                 *31   No. points in spectrum
  #12   Hot blackbody temp.(C)          32   Calibration record 1
  #13   Cold blackbody temp. (C)       *33   Interval in independent variable
  #14   DC Level, Channel 1            *34   Minimum value, independent var.
   15   DC Level, Channel 2            *35   Maximum value, independent var.
   16   DC Level, Channel 3            *36   Number of 32-bit words/record
   17   Year (of observation)           37   Number of header words (100)
   18   Month                           38   Spectral resolution
   19   Day                             40   Number of records in file
   20   Data type                   41..46   BB temps and cal.rec.nos.
        (1:preflight,2:flight,          51   Latitude
         3:postflight,4:lab test)       52   Longitude
                                        53   Aircraft altitude (feet)
                                        54   Aircraft heading
   Additions --

   55   HBB temp correction coeff. no. 1
   56   HBB temp correction coeff. no. 2
   57   HBB temp correction coeff. no. 3
   58   CBB temp correction coeff. no. 1
   59   CBB temp correction coeff. no. 2
   60   CBB temp correction coeff. no. 3
   61 .. 78 SCAM temperatures (averages)

   In files output by AVDIRS.EXE (average of 2 scan directions):
   81   Time (seconds) in "file 1" (earlier file)
   82   Time (seconds) in "file 2" (later file)
   83   Time (HHMMSS)  in "file 1" (earlier file)
   84   Time (HHMMSS)  in "file 2" (later file)

   In files output by COADDHIS.EXE:
   85   Mean spectral average
   86   Standard deviation of spectral average
   87   First wavenumber for spectral average
   88   Last  wavenumber for spectral average
   89   Aircraft heading in first record of average
   90   Aircraft heading in last record of average

   In files output by HISAC3.EXE:
   91   Mean HBB temperature from calib. point 1
   92   Std.Dev. HBB temp.   from calib. point 1
   93   Mean CBB temperature from calib. point 1
   94   Std.Dev. CBB temp.   from calib. point 1
   95   Mean HBB temperature from calib. point 2
   96   Std.Dev. HBB temp.   from calib. point 2
   97   Mean CBB temperature from calib. point 2
   98   Std.Dev. CBB temp.   from calib. point 2

 ............................................................................

   + NOTE: In the files of calibrated spectra, words 25, 26 and 27 are
     ambient temperature, hot blackbody emissivity and cold blackbody
     emissivity, respectively.

   # NOTE: In the Bomem M120 files words 7..14 contain thermistor values.