RADAR stands for RAdio Detection And Ranging.

What does the radar at INTECH detect and show on the screen?

 

Air traffic control, police speed detection devices, NASA and weather forecasters all use radar. Radar is used to detect the presence of an object at distances, detect the speed of an object and for mapping objects.

Radar uses 2 concepts echo and Doppler Shift.

Echoes occur when sound bounces back off a surface. The length of time between say you shouting and the moment that you hear the echo is determined by the distance between you and the hard surface.

Doppler Shift is common and you probably hear it daily. It is the sound that is generated by, or reflected off a moving object. As a moving object gets nearer to you the sound you hear changes. This is known as the Doppler Shift.

Radar uses radio waves as they travel far, invisible and are easy to detect. Radar sends out short, high intensity burst of high frequency radio waves. The radar receiver is then turned on and listens for the echo. The radar can then calculate using the echo and the Doppler Shift where an object is and how fast it is moving. This information is shown on a screen.

 

Sound and hearing

Changing sounds