The filenames of the data are set up as follows:  the first four digits are
the ARGOS ID # of the unit, the next two are the month, followed by two more
digits indicating the year.  All files have a .r extension.  So, a filename
like 89060589.r would be data for site 8906 during May of 1989.  Some files
have an 'x' in the filename; this is done when there are data for the same
ID # for two or more sites during the same month.  An 'x' may replace the '0'
in the month part of the filenames during January and February, and replace
the leading 8 in March through December, or alternately replace the leading 
'8' for all months in question (prevalent with 1994-on) .  It is important to
watch for these files.  A file such as 8911x189.r would be data for 8911
during January of 1989, and so would 89110189.r; the thing to note is that,
either two stations existed side by side with the same filename, or the
station was moved part way through the month.  A file such as x9150690.r
would be a file in a similar fashion, though this one is obviously for 8915
during June of 1990.  Additionally, during 1988, there were two pairs of
stations with the same id numbers (8902 and 8916).  One group is simply given
in the filenames as 8902####.r and 8916####.r, and the other pair appear the
same, though with an x instead of the 9 in the name.

The data are organized in ten minute intervals, with either six or eight
columns.  The data are also uncorrected; ie. they still have bad data points.
They have been taken directly from the originally transmitted hexadecimal
data.

The data sets with six columns are organized as follows:  each file has a two
line header, followed by data.  The columns are:  julian day, ten minute
interval marker, temperature, pressure, wind speed, and wind direction.  The
ten minute interval marker is a number between 1 and 144 representing time;
1 is 00:00, 2 is 00:10, 3 is 00:20, 7 is 01:00, and 144 is 23:50.

The eight column data is exactly the same as the six column, except for the
two additional columns:  humidity and vertical temperature difference.
(Bonaparte Point and Santa Claus Island have water temperature instead 
of vertical temperature difference).

All times listed are GMT and missing data are indicated as 444.0.  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 is in the following units: temperatures in degrees Celsius, station
pressure in millibars, wind speed in meters per second, wind direction in
meteorological degrees, and relative humidity in percent.

Questions?  Send e-mail to aws@ssec.wisc.edu