We basically make doppler radars - here frequency-shift is proportional to the speed of the object. Most other radars (pulse-radars) uses the bandwidth of a pulse to gain range resolution (the wider the bandwidth the better the res).

Here's a few (very old) plots of how our radars see the world through a spectrogram: https://weibelradars.com/space/space-industry/

What would be cool, would be a browser-based way to do soft analysis of these plots.