Very Low Altitude Detection of Small Stationary Targets at Very Slow Speeds: a Simulation Study Using Strip Photography.
AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO
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The target-seeking behavior of observers was examined at four different image motion rates using strip photography film taken at a 497-foot altitude. Targets imaged at a scale of 1274 on a 14 by 14-inch display screen showing a 320 by 320-foot ground area were garbage cans and manhole covers in a residential suburb. Film moved through the projector at 3, 6, 9, or 15 inchesminute representing conditions of either rapid flash reporting or screening, or else aerial search for small targets with a 2.2X stabilized periscope at very slow helicopter speeds. Thirty-eight subjects were dividied into four groups. Each group was tested at a different speed 2.1, 4.2, 6.3, and 10.5 knots respectively. Conclusions are drawn about rapid film screening and about periscopic search for small targets at very slow speeds. Author
- Cartography and Aerial Photography