How is radar accuracy measured?

With a pulse radar, the run time is generally measured from the rising edge of the transmit pulse to the rising edge of the echo signal. The accuracy of this measurement depends on the magnitude of the clock frequency for this time measurement .

The reflected radar signal is measured by the radar’s receiver with a change in frequency . That frequency shift is directly related to the motion of the raindrops. When a storm is stationary, the transmitted energy and the reflected energy or “echo” will not change, as shown below.

The fundamental principles of radars are the same at any frequency; however, the technical implementation is widely different. Most radars, in practice, operate between 400 MHz to 36 GHz ; however, there are some notable exceptions.