Check out a Bash Bunny, a IP spy gadget.... A related idea.
Just think it your inSidDeR can receive radio signals, process them and do what the Bash script tells it to do ... save the data in a flash, upload it somewhere, stream it, etc.
It's actually a very powerful tool. It can be used to monitor a repeater, It can be used as a crowd-sourced interference finder. It can be used for a time signal decoder, it can be used for a remote reset on remote computer servers. etc. etc. Like most tools, this one has two edges. It can also be used for evil.