NetLogo User Community Models
by James Steiner (Submitted: 10/17/2003)
WHAT IS IT?
This model is a demonstration of how RADAR works.
RADAR is an acronym for RAdio Detection And Ranging
RADAR works by measuring the time it takes for a directed radio pulse to bounce off a distant object and return to the source.
The return time is directly proportional to the distance of the object related to the speed of light. ( d = t/2c )
A real radar pulse travels at the speed of light. Our radar is not so fast, but still works pretty well.
Sonor works in a similar fashion, but uses sound waves instead of radio waves.
HOW TO USE IT
THINGS TO TRY
Adjust the sweep-angle, ufo-speed, and resolution.
Note how these variables affect the success of radar at finding the UFOs.
Use the slow-down slider to slow down time. Now you can follow the radio waves as they propigate out, bounce back, and are received again.
EXTENDING THE MODEL
How about doppler radar?
To get the sweeping single line of the scope, a custom turtle shape of a circle with a line from the center is used.
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