To determine the size of the target, you also use the crosshairs. So depending on the unit,
you can count the sensors in the scan and determine how many inches wide the object is in
the scan. Example, using a XL16 IMAGER PRO with a 16 sensor, antenna count using the
crosshairs over from left to right starting with 1 because the first position gets information
(each sensor gets 1 count). So each 16 sensors over is 24 inches per sixteen sensors (when
using a 24" antenna). So say the scan is made up of 4 rows and the target completely fills
two of the rows we can determine that that the object is 48 inches wide.
Now to determine length, we have a person imaging determine how far they can walk in
one second. So, if that is 2 feet every so every six clicks up using the crosshairs is one
second traveled forward. So say the object covers 6 clicks that would be equal to 2 feet so
we now know that the object is 24 inches long and 48 inches wide.
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