Flight Test Evaluation of a Prototype Optical Instrument for Airborne Sense-and-Avoid Applications
2012
A prototype, wide-field, optical sense-and-avoid instrument was constructed from low-cost commercial off-the-shelf
components, and configured as a network of smart camera nodes. To detect small, general-aviation aircraft
in a timely manner, such a sensor must detect targets at a range of 5-10 km at an update rate of a few
Hz. This paper evaluates the
flight test performance of the "DragonflEYE" sensor as installed on a Bell 205
helicopter. Both the Bell 205 and the Bell 206 (intruder aircraft) were fully instrumented to record position and
orientation. Emphasis was given to the critical case of head-on collisions at typical general aviation altitudes and
airspeeds. Imagery from the DragonflEYE was stored for the offline assessment of performance. Methodologies
for assessing the key figures of merit, such as the signal-to-noise ratio, the range at first detection (R 0 ) and
angular target size were developed. Preliminary analysis indicated an airborne detection range of 6:7 km under
typical visual meteorological conditions, which significantly exceeded typical visual acquisition ranges under the
same conditions.
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