content: I agree these radars are fairly sophisticated now, essentially miniaturized pulse doppler synthetic apature radar. I've got a unit I pulled from a Chrysler 300 that i hooked up to an Arduino based on this white paper. https://etd.ohiolink.edu/!etd.send_file?accession=ohiou1304083389&disposition=inline It can track 30 targets simultaneously at a range of a few hundred yards.