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# Updated: 16 July 2013                                                   #
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The file names for the 3-hourly data are constructed using the station's 
ARGOS identifier, the month, and the year.  A file name such as 9061291h.dat
would be read as station 8906 (906), December (12), 1991 (91), contains a
two-line header (h), extension indicating ASCII format data (.dat).  Note
that the leading '8' is dropped from the ARGOS ID to allow for an 8 character
file name.  The data are arranged in columns of temperature (degrees C),
pressure (mb), wind speed (m/s), wind direction, relative humidity, and
vertical temperature difference.  Dome Fuji (8904) are an exception to this,
where the relative humidity column is instead lower temperature (C).

The vertical temperature difference is measured from 3.0m to 0.5m minus the 
zero calibration.  Missing data are represented as 444.0.  All months have 
31 days.  Note that the four column datasets are arranged as above, minus 
relative humidity and vertical temperature difference.  Wind directions 
listed are the direction the wind is blowing from, from 0 to 360 clockwise 
(thus 90 degrees is east, 180 is south, and 270 is west). The data set is 
composed of the nearest valid instantaneous observation within 40 minutes 
of the synoptic reporting times (i.e., 00, 03, 06, 09, 12, 15, 18, and 21).