Accession Number : AD0294781

Title :   EXPERIMENTAL EVALUATION OF AN EIGHT-INCH CRT CONTACT ANALOG PRESENTATION

Corporate Author : BELL HELICOPTER TEXTRON INC FORT WORTH TX

Personal Author(s) : FEDDERSEN, W.E.

Report Date : MAY 1962

Pagination or Media Count : 1

Abstract : A summary is presented of the work undertaken to determine the effect upon performance of a change in geometric perspective of ground plane information as introduced by a reduction in the physical size of a contact analog display. This study was necessitated by the introduction of a 'compression' factor which is associated with a reduction in display size when achieved with projection or closed circuit TV systems. Since this compression factor represents a departure from real-world coincidence, it was necessary to determine its effect upon hovering performance when compared with the Autonetics display in which the compression factor was not present. The results indicate that the differences in performance on the two displays were not significant and that rather gross changes could be made in ground plane perspective without affecting performance. Although the limits of such allowable changes have not been established, it would appear that as long as the perceptual relationship between the generated ground plane and the earth's surface is analogous, then the limits of such changes might be quite broad. (Author)

Descriptors :   *ANALOG SYSTEMS, *TELEVISION DISPLAY SYSTEMS, ANALOG COMPUTERS, CATHODE RAY TUBES, CIRCUITS, HELICOPTERS, HORIZONTAL INDICATORS, SIMULATION.

Distribution Statement : APPROVED FOR PUBLIC RELEASE