ESS124
Prof.
Jin-Yi Yu
Radar
•Weather radars are used to monitor precipitation.
•Radars send out microwave signals in a narrow beam from it transmitter in a very short time (about 1 millionth of a second).
•When microwaves encounter raindrops and hailstones, some of the
energy is
scattered back to the radar, whose the microwave echo is received.
•Based on the time between the microwave is transmitted and
received, speed of
light, antenna angle, radars can find the locations of rain in space