Hi Dave, You had asked for a copy of my program for doing "statistical visualization" of turbulence spectra. The source files are in my directory ~u4613/public/bessim on the Cray C-machine at NERSC. I will keep it there for the next week or two, so you will have time to copy it from there to your own directory somewhere. On our Sun workstations, to compile this program one would type: % cd bessim % make # To compile the program % more bessim.doc # To read the documentation file % bessim # To run the program BESSIM makes use of some random number generators from the NAG library (which could be replaced by other random number generators), some HDF routines, and the ximage tool for visualizing 2D scientific data on X-terminals (versions also exist for the Macintosh). Ximage is functionally equivalent to the commercial "Spyglass" package for the Macintosh. HDF and XImage are available via anonymous ftp from the National Center for Supercomputing Applications (versions on the NERSC Cray's probably exist somewhere, but I don't know where). Alternatively, you can write out the array den(x,y) near the end of bessim.f in any format you want and plot it with any contour plotting package you can get your hands on. If you choose to try the tools from NCSA, type: % ftp ftp.ncsa.uiuc.edu # or ftp 128.174.20.50 Connected to zaphod.ncsa.uiuc.edu. 220 zaphod FTP server (Version 6.23 Sun Aug 23 22:04:57 CDT 1992) ready. Name (ftp.ncsa.uiuc.edu:hammett): anonymous 331 Guest login ok, send e-mail address as password. Password: ftp> get README.FIRST ftp> quit % more README.FIRST Finally, the way the program is currently interfaced to HDF, you would also need to get the fptohdf tool written by Dave Coster at PPL. Contact him at dcoster@theory.pppl.gov. ********************************************************** It might actually be simpler if you just modify bessim.f near the end to write out the array den(x,y) in any format you need. Then you can plot it with any contour plotting package you can get your hands on.