The variable $STAR will point directory to the release area you're in (e.g. if you're in "pro" which is currently sl98e, $STAR will point to $STAR_PATH/SL98e = /afs/rhic/star/packages/sl98e)
Each release directory (eg. $STAR_PATH/SL98e) contains the following structure (not exhaustive):
.$STAR_SYS - Platform-specific build area named as '.' followed by the $STAR_SYS architecture name (eg. i386_linux2, sgi_64, sun4x_56) /bin/ - Binary Files /dep/domain - Dependency files /lib/ - Libraries /obj/domain - Object files kumacs /chain - principal driver kumacs for several domains /util - utility kumacs /domain - principal driver kumacs for particular domain pams /domain - packages for each domain /idl - table idl files /inc - Include and header files used by more than one packag /kumac - kumac files for each package /package - package directories params /domain - parameter files, geometry, switches etc. for each domainAlso used are files in /afs/rhic/star/data = $STAR_DATA which contains data files. See especially samples subdirectory.