rybak+doppler

Doppler radar is used by cops to determine the speed of a car. it is also used by the weather man to predict weather patterns and the amount of precipitation to expect. In order to use it correctly you need careful control of the radar system is required. it sends out pulses and the by the speed and depth of the pulse help them draw pictures and to make educated guess. there is one draw back the pulse Doppler has a maximum speed and then the gun does not work and cant measure the radial velocity.

http://www.weatherusa.net/blog/images/doppler-orlando-1943.gif

http://www.knmi.nl/~beekhuis/images/dopplerradar.gif