Thanks chuck, I think it shall help. Eduardo 2007/6/4, Charles Seman <Charles.Seman at noaa.gov>: > Eduardo, > > Check out these links: > > ftp://grads.iges.org/grads/sprite/udf/ > ftp://grads.iges.org/grads/sprite/udf/README.psichig > ftp://grads.iges.org/grads/sprite/udf/psichig.tar > > I hope this helps, > Chuck > > >