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Proceedings Paper

Outside scene obscuration by a millimeter-wave radar image presented on a HUD
Author(s): Richard B. Huntoon; Timothy W. Rand; Mary Beth Lapis
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Paper Abstract

We investigated whether a raster image on a Head-Up Display (HUD) might interfere with runway recognition during a low-visibility (CAT II and IIIa) approach. The primary reason for incorporating a HUD into the flight deck is to allow the pilot to observe instrument information while maintaining a view of the outside scene. The raster image could, however, obscure the outside scene, leaving the pilot unaware that the approach or runway lights are visible. In our HUD lab, twenty-one subjects were asked to observe a simulated outside scene through a HUD and indicate when they first saw runway approach lights. Each subject was presented 12 data runs with a simulated 35-GHz raster radar image and stroke symbology simultaneously presented on the HUD, and 12 data runs with only stroke symbology on the HUD. Each run was conducted under simulated fog conditions of either 700-ft Runway Visual Range (RVR) or 1200-ft RVR. We found that the presence of the radar image decreased the recognition range by 24 percent (z equals 5.71, p < 0.001). Subjective comments by the study participants show that the radar serves as a valuable aid in confirming flight path alignment with the runway under low-visibility conditions.

Paper Details

Date Published: 30 June 1995
PDF: 10 pages
Proc. SPIE 2463, Synthetic Vision for Vehicle Guidance and Control, (30 June 1995); doi: 10.1117/12.212742
Show Author Affiliations
Richard B. Huntoon, Rockwell International Corp. (United States)
Timothy W. Rand, Rockwell International Corp. (United States)
Mary Beth Lapis, Rockwell International Corp. (United States)

Published in SPIE Proceedings Vol. 2463:
Synthetic Vision for Vehicle Guidance and Control
Jacques G. Verly, Editor(s)

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