Quote:
Originally Posted by a9127
...The technology of the time included radar (based on WWII technology—no Doppler then)...
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Doppler just means the change in frequency between the transmitted signal and the received signal. All radar does and always has worked by the Doppler effect.
The difference between early radar and modern versions is the quality of the receiver/computer that can process the returned signal. Modern radar is able to get more and better detail than the old analogue vacuum tube radar.