The first three lines are header information which includes the month and year
over which the average of the data were taken, the instrument, the type of
processing (eg., production, near real time, etc), and the feature of
study (ozone, aerosols, etc.).

Data values at 288 longitudes for each latitude centered at -89.5 degrees
are given. The next 288 values are given for the latitude centered at -88.5
degrees and so on.  In the case of aerosols, "999" is used for missing or
flagged data.  Aerosol values are given as the aerosol index X 10.
The aerosol monthly average data sets were computed using only positive
values (i.e. absorbing aerosol indices) of the aerosol index for each
month. Values of zero are used in the averaging anytime the aerosol index
is negative. The final monthly average data sets contain aerosol index
values greater than or equal to 0.7.