Many factors affect the suitability of a simulator's out-the-window simulator visual system. Contrast, brightness, resolution, field-of-view, update rate, scene content and a number of other criteria are common factors often used to define requirements for simulator visual systems. NASA has recently completed the installation of a research simulator for the United States Air Force Operational Based Vision Assessment program. The purpose of this program is to provide the Air Force School of Aerospace Medicine (USAFSAM) with a scientific testing laboratory to study human vision and testing standards in an operationally relevant environment. Requirements for this research simulator include high luminance, a large field of view, a spherical projection dome, and a large color gamut capable of reproducing aviation red, green, and blue. A significant challenge was to meet the resolution requirement; approximately 0.5 arcmin/pixel, equivalent to 20/10 vision. In addition to static resolution, it was also necessary to consider dynamic resolution (i.e. the perceived resolution of moving imagery) as well as other visual artefacts.
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