DIY Doppler Radar - YouTube

Build a Small Radar System Capable of Sensing Range, Doppler, and Synthetic Aperture Radar Imaging | MIT OpenCourseWare

you won't find SAR capability in your average police radar

s-band system using two coffee cans which just happen to be the perfect transmit and receive antenna dimensions for a s - band system.

How about that. Who'd have thought !

MIT free, open course where downloadable project

0ne KM range