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The objective of this paper is to present the details surrounding the experimental design and flight test program used to
evaluate the performance of an Optical Head Tracker (OHT) under dynamic flight and intense solar conditions. This
program was a collaborative effort led by the Air Force Research Laboratory (AFRL) in close concert with NASA-Glenn
Research Center (NGRC) based in Cleveland Ohio and contractors supporting the laboratory. The thrust of this paper
will focus on the experimental design necessary to effectively evaluate the OHT performance, as well as safety of flight
considerations necessary to satisfy both AFRL and NASA strict safety requirements. Discussions will include airborne
platform selection, modification, and operations necessary to achieve maximum solar exposure on the OHT while
ensuring a representative environment was presented to the OHT during the experiment.
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Michael R. Sedillo, David W. Harris, Douglas L. Franck, "Chasing the sun: the in-flight evaluation of an optical head tracker," Proc. SPIE 6224, Helmet- and Head-Mounted Displays XI: Technologies and Applications, 62240A (18 May 2006); https://doi.org/10.1117/12.663562