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AIRPORT TECHNOLOGY R & D BRANCH
Infra-red Sensors
The
infra-red (IR) sensors are IR emitters and detectors located on
opposite sides of the runway. They are used to detect the passage of
an aircraft which then triggers the data acquisition system to
record data from dynamic sensors. The time differences of triggering
of these IR sensors are used to calculate aircraft velocity and
positions. IR sensors 1, 2, 4, 5, and 7 are perpendicular to the
runway centerline and are used to compute the longitudinal position
and velocity of the aircraft (under the assumptions that the
longitudinal acceleration and lateral position are constant as the
aircraft passes through the beams). Sensors 3 and 6 point diagonally
across the runway (1 unit longitudinally to 2 units laterally) and
are used to compute, in conjunction with the perpendicular sensors
signals, the lateral position of the aircraft.
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Contact the Project Lead: Dr. David
Brill, AAR-410
Last Update: 01/27/03
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