We're experiencing intermittent network problems affecting data downloads.
Thank you to those who have reported and inquired.
We apologize for any inconvenience.
This is the full source code for NCL and NCAR Graphics Version 6.4.0. Compiling this source code requires cairo and other related libraries to be available. See http://www.ncl.ucar.edu/Download/ for more information. Use of this software implies agreement of the NCL source code license: http://www.ncl.ucar.edu/Download/NCL_source_license.shtml