Doppler Radar
Danielson et al
¥Doppler can detect motion toward or away from radar by the frequency of the return beam
¥Higher - toward radar
¥Lower - away from radar
¥Doppler effect explains why pitch of whistle changes as a
train approaches then moves away
Frequency of
return beam changes when
reflective object is moving either toward
or away from radar. Velocity can
be determined from frequency
shift.
Lower
frequency
Higher
frequency