Table 1.--POST format for magnetic data
           [IGRF, International Geomagnetic Reference Field]
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     Item             Description
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  columns 1-8        Station name
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    Eight items in free format (separated by a blank space)
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      1.  Longitude, in degrees
      2.  Latitude, in degrees
      3.  Total magnetic field - IGRF, in nanoteslas
      4.  Total magnetic field, in nanoteslas
      5.  Height above terrain, in ft
      6.  Elevation, in ft
      7.  Time, in seconds
      8.  Year and day of measurement (yr.day)
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