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Ensuring fidelity using visual warping techniques
Published May 08, 2002 by Royal Aeronautical Society in United Kingdom
During the past two decades, one of the major causes of aircraft accidents has continued to be ""Controlled Flight Into Terrain"" (CFIT). In response to this problem, aircraft manufacturers and their component vendors have steadily enhanced onboard equipment to give the pilot more information about the world outside the aircraft. The accurate simulation of real- world terrain, radio aids, and visual topography, therefore, is of critical importance in flight simulation. This new need for accurate simulation of the radio navigation environment has forced a reconsideration of the method used to align visual scenes to radio landing aids.
The common method of obtaining alignment between features of the visual scenes and the radio landing aids is by redefining the location of radio navigation stations. We discuss the serious disadvantages of this method and the impact that relocated stations have on the Flight Management Computer.
This paper also provides an extensive description of an alternative method of alignment developed by the United Airlines Simulator Engineering Department. This alternate method, called VisWarp, aligns the visual scene by warping (i.e., offsetting) the location of the visual-system eye point. This provides the crew with a visual view that is consistent with the cockpit indications of aircraft location, relative to runways, gates, and other visual features that have locations documented in the published radio navigation database.