You have a much more active imagination than I do.

Others have linked the code and an article about someone trying it out. What you can do with this is that you wave around two yagi antenna. You point one at a broadcast source and an other at something flying in the opposite direction from the broadcast source. If all the stars align and the system works you then get the range, and the dopler. The measured range is the full distance from the broadcast source to the object and back to you.

This is not a radar where the user gets a display full of tracks in front of them. One maybe one day might develop something like that from this core.

Even if it were a stealth radar like that it is very dubious how it would help a drug smuggling operation, or why they would bother with it at all.