NOTE the data sets in this directory are PRELIMINARY and are based
only on polar orbiting satellite data. They are placed on line for
the primary productivity working group, but may be copied by all.

Files in this directory:

Readme                   this file
dxsdsread.f              fortran program which reads the hdf data sets
dxsdsread.output.example output from the program.

199704.tar               Unix Tar file for April 1997 data
  dxclfrdp2.199704.sds     daytime averaged cloud fraction
  dxcoszdp2.199704.sds     24 hour averaged cosine solar zenith angle
  dxdffrdp2.199704.sds     daytime averaged diffuse fraction of par
  dxqclddp2.199704.sds     24 hour averaged solar irradiance (W/m2)
                           all sky (including cloud effects)
  dxqclrdp2.199704.sds     24 hour averaged solar irradiance (W/m2)
                           clear sky (no clouds)
  dxqpardp2.199704.sds     24 hour averaged PAR (W/m2)
                           all sky (including cloud effects

199712.tar                "    "   "    "  Dec   1997 data
  dxclfrdp2.199712.sds
  dxcoszdp2.199712.sds
  dxdffrdp2.199712.sds
  dxqclddp2.199712.sds      
  dxqclrdp2.199712.sds      
  dxqpardp2.199712.sds     


NOTE: the files in the tar archives 
are compressed using 'gzip' and need to be uncompressed 
prior to using.


                         to compile dxsdsread.f use a f77 compiler as follows

f77 -c dxsdsread.f; f77 dxsdsread.o -L/usr/local/hdf/lib -lmfhdf -ldf -ljpeg -lz -o dxsdsread

dxsdsread dxqclddp2.199704.sds 
produces output as in the above example.

Jim Bishop 27 September 1999