I am working on a project where we are trying to see what a radar would be able to see. For example, we have a radar that is a certain height and we have either a DEM or a DSM. What we want to be able to do is plug in a certain height (say 500 ft MSL) and see what planes the radar would be able to pick up in the sky. Kind of like a viewshed analysis in the air rather than on the ground. Anyone ever done this or have any ideas on how to do it? Thanks.