Originally Posted by
Warren Peace
The total costs, for the end user to monitor Secondary Radar in this way, come to less than £100 as a one off. You buy a small device (Raspberry Pi, or use an old PC) and connect it to a cheap mast, on the chimney or in the loft, and using your domestic broadband, you send away to the server, all that it hears.
You do of course also need a receiver connected to your PC or Raspberry Pi in order to capture the transmissions.