Effects of magnification and visual accommodation on aimpoint estimation in simulated landings with real and virtual image displays / Robert J. Randle, Stanley N. Roscoe, John C. Petitt.

Format:

Book

Government document

Author/Creator:

Randle, Robert J., author.

Roscoe, Stanley Nelson, 1920-2007, author.

Petitt, John C., author.

Contributor:

Ames Research Center

United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, issuing body.

Series:

NASA technical paper ; 1635.

NASA technical paper ; 1635

Language:

English

Subjects (All):

Instrument landing systems.

Landing aids (Aeronautics).

Flight simulators.

Genre:

Online resources.

Physical Description:

1 online resource (iii, 25 pages) : illustrations

Place of Publication:

[Washington, D.C.] : National Aeronautics and Space Administration, Scientific and Technical Information Branch, October 1980.

Summary:

Twenty professional pilots observed a computer-generated airport scene during simulated autopilot-coupled night landing approaches and at two points (20 sec and 10 sec before touchdown) judged whether the airplane would undershoot or overshoot the aimpoint. Visual accommodation was continuously measured using an automatic infrared optometer. Experimental variables included approach slope angle, display magnification, visual focus demand (using ophthalmic lenses), and presentation of the display as either a real (direct view) or a virtual (collimated) image. Aimpoint judgments shifted predictably with actual approach slope and display magnification. Both pilot judgments and measured accommodation interacted with focus demand with real-image displays but not with virtual-image displays. With either type of display, measured accommodation lagged far behind focus demand and was reliably less responsive to the virtual images. Pilot judgments shifted dramatically from an overwhelming perceived-overshoot bias 20 sec before touchdown to a reliable undershoot bias 10 sec later. Landing approach, Visual perception, Ground-referenced display, Image magnification, Visual accommodation, Aimpoint estimation.

Notes:

Title from title screen (viewed on August 10, 2016).

"October 1980."

"Performing Organization: NASA Ames Research Center"--Report documentation page

Includes bibliographical references (pages 23-25).

Electronic reproduction. [Place of publication not identified] : HathiTrust Digital Library, 2012.

Other Format:

Print version: Randle, Robert J. Effects of magnification and visual accommodation on aimpoint estimation in simulated landings with real and virtual image displays

Microfiche version: Randle, Robert J. Effects of magnification and visual accomodation on aimpoint estimation in simulated landings with real and virtual image displays

OCLC:

784987899

Access Restriction:

Use copy Restrictions unspecified