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15 April 2008 An approach to instrument qualified visual range
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Abstract
This paper describes a system that calculates aircraft visual range with instrumentation alone. A unique message is encoded using modified binary phase shift keying and continuously flashed at high speed by ALSF-II runway approach lights. The message is sampled at 400 frames per second by an aircraft borne high-speed camera. The encoding is designed to avoid visible flicker and minimize frame rate. Instrument qualified visual range is identified as the largest distance at which the aircraft system can acquire and verify the correct, runway-specific signal. Scaled testing indicates that if the system were implemented on one full ALSF-II fixture, instrument qualified range could be established at 5 miles in clear weather conditions.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Benoît Courtade, Jordan Bonnet, Chris Woodruff, Josiah Larson, Andrew Giles, Nikhil Sonde, C. J. Moore, David Schimon, David Money Harris, Duane Pond, and Scott Way "An approach to instrument qualified visual range", Proc. SPIE 6957, Enhanced and Synthetic Vision 2008, 69570Q (15 April 2008); https://doi.org/10.1117/12.785465
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