MODION : a graphical tool composed of IDL widgets for creating an approximate and simplified model of the energy Levels and transitions of an atom/ion. Written by F.Varosi, T.Lanz, A.Dekoter, I.Hubeny, S.Heap, at NASA/Goddard 1995. Requires as input the files generated by TOPBASE to get energy Levels, gf-values of lines, and photoionization cross-sections. Modeling work in progress is stored in IDL/XDR save/restore files. The results of MODION can be output in formats which are read by the stellar atmosphere models of Lanz, Hubeny, and Dekoter. For more information contact: LANZ@stars.gsfc.nasa.gov or: varosi@gsfc.nasa.gov To install MODION: ftp idlastro.gsfc.nasa.gov user: ftp pass: (anything) ftp> cd pub/contrib/varosi ftp> bin ftp> get modion-install.tar (this has everything in it) % tar xvf modion-install.tar (creates files in new sub-dir) % cd install.modion (change to newly created dir) % install_modion (does all of the installation) Edit the file ~/install.modion/idl_setup to setup your environment. Then "source ~/install.modion/idl_setup" sets the environment variables and defines the alias "modion" which you can enter at your system prompt. If you exit back to IDL>, then enter "modion" to start again. Instead of the alias you could: "cd ~/modion", execute idl, and at IDL> prompt type "modion". -------------------------------------------------------------------------------- To later upgrade MODION to new release, ftp as above and get the files: modion.tar.Z (the MODION specific IDL code) vlib.tar.Z (Varosi's general purpose IDL code library) place them in directory install.modion (was created by install_modion), and then you have following options: to overwrite current code: % untar # executes shell script to install code. or, to move current code into dirs ~/modion/old_code and ~/idl/old_vlib and install new code: % newcode or, to revert back to "old_code" and "old_vlib": % oldcode --------------------------------------------------------------------------------