Doppler Radar

Doppler Radar is a form of Active Remote Sensing that emits radio or microwave radiation to determine speed and direction of objects.  The Weather Channel uses this form of radar to create weather maps shown on TV.


The map shown is a Doppler Radar image of Hurricane Wilma. Radio or Microwave radiation was emitted to determine the movement of this storm.

http://mitzel.us/Wilma/radar.htm