To obtain a full version of Doris, the getorb (precise orbits), GMT (mapping tool, helper for fine co-registration) and gv or ghostview (to display postscript files in csh-script plotscript) should be installed on your system. These programs can be obtained freely, but are not included in the Doris distribution.
At our homepage you can find out more on how to obtain these packages. (http://enterprise.lr.tudelft.nl/doris/).