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IntroductionThe Interactive Radar Analysis Software package (IRAS) is a collection of routines which allow one to display and analyze digital radar data. It has evolved from a set of Fortran routines running under MS-DOS on a PC to its current form as a set of C routines running under a Motif/X-Windows environment on a Unix workstation (Motif-IRAS). Motif-IRAS is currently supported on the following platforms: Sun SPARCstation (Solaris 2.3), HP 9000/7xx (both HPUX 9.05 and HPUX 10.01), IBM RS6000 (AIX 3.2) and Silicon Graphics (IRIX). Porting to other systems supporting Motif/X-Windows should not be a big problem. Motif-IRAS consists of a single executable along with a number of support files including: IRAS resource file, color table files, map files. The IRAS resource file is a standard text file containing names of a number of global variables and default values. Each user should have a copy of this file in their home directory. However, this file is not required to run Motif-IRAS (internal defaults are provided). Color table files are simple text files associating RGB values (in the range 0-255) to each of the 64 radar display color indicies. An internal default table is provided in the event no color table files exist. Map files are a collection of text files containing longitude/latitude pairs representing one segment of a map boundary. These files are also not required. In addition, IRAS provides selections to display grids, aircraft flight tracks, lightning strike positions, and special symbols and lines. When installing Motif-IRAS it is recommended that either a copy or a link to the executable file, "./motif_iras/src/motif_iras" be put in a directory like /usr/local/bin (at least some directory in the users path). Also, it is recommended that a copy of the IRAS resource file, "./motif_iras/.iras-init", be copied to your home directory and edited to reflect your run-time environment. Each variable in the resource file is described by a comment at the end of each line.
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