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A target can be anything that is moving faster than 10 MPH/16 KPH. To acquire the speed of a target,
with the speed radar powered on, aim at the target and depress the TRIGGER. An icon will appear in
the upper right corner of the LCD display. This indicates the Doppler Radar is functioning. The radar will
continue to be active searching for speed until the trigger is released. Upon release of the trigger, the
fastest speed captured within that series will automatically be displayed. The speed of the target will
appear on the LCD display in MPH or KPH.
There are certain mathematical properties of Doppler Radar that affect the accuracy of the Velocity
Radar Gun. As a quick reference to accuracy, remember to keep your targets direction of travel in a
direct line with you, and not perpendicular.
The Velocity Radar Gun will measure the relative speed of a target as it approaches the radar gun. If
the target is in a direct line (collision course) with the radar gun the measured speed will be exact. As
the angle of incidence increases, if you move either right or left of this direct line, the accuracy will
decrease. The measured speed will decrease as you move off this centerline. This phenomenon is
called the Cosine Effect. It is called this because the measured speed is directly related to the cosine of
the angle between the Radar gun and the target’s direction of travel.
PocketLab connects with a single button to a smartphone, tablet,
Chromebook or computer and instantly streams data that you can see and record.
The Go! Motion is easy to use, allowing students to focus on learning
scientific concepts instead of setting up the lab. See data graphed in real time!
PocketLab Voyager Classroom Set of 10 (P4-1010)
Pocketlab classroom comes with: 10 PocketLab
Voyagers, charging station with 5 ports, 10 micro-USB cables, and a durable carrying case (a $58
value).
Target
Cosine Effect
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