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Oman, Charles M.
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Analog track angle error displays improve simulated gps approach performance

Massachusetts Institute of Technology-Charles M. Oman, Scott A.M. Rasmussen
Volpe National Transportation Systems Center-M. Stephen Huntley, Jr.
  • Technical Paper
  • 1996-14-0003
Published 1996-08-26 by Human Factors and Ergonomics Society in United States
Pilots flying non-precision instrument approaches traditionally rely on a course deviation indicator (CDI) analog display of cross track error (XTE) information. The new generation of GPS based area navigation (RNAV) receivers can also compute accurate track angle error (TAE). Does display of supplementary TAE information improve intercept and tracking performance? Six pilots each flew 20 approaches in a light twin simulator to evaluate 3 different TAE/XTE display formats, in comparison to a conventional receiver CDI display and a more centrally located Horizontal Situation Indicator (HSI). Statistically significant performance improvements were seen in several phases of the approach when using the supplementary TAE information. Analog was preferred over numeric format. However, the advantage was offset by the need to widen the pilot's instrument scan to include the receiver display. Pilots found TAE helpful in establishing intercepts and the appropriate wind correction angle. Findings support the recent FAA TSO-C129 requirement that XTE be presented in the pilot's primary field of view, and the recommendation that avionics manufacturers include supplementary analog TAE display capability
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Spacelab Neurovestibular Hardware

Massachusetts Institute of Technology-Laurence R. Young, Charles M. Oman, William F. Mayer
Published 1991-07-01 by SAE International in United States
A set of devices for measurement of human balance orientation and eye movements in weightlessness was developed for neurovestibular experiments on Spacelab. The experiments involve astronaut motion, limb position changes, and moving visual fields, measurements are made of eye movements, muscular activity and orientation perception.This joint US/Canadian research program represent a group of closely related experiments designed to investigate space motion sickness, any associated changes in otolith-mediated responses occurring during weightlessness, and the continuation of changes to postflight conditions. The otoliths are a component of the vestibular apparatus which is located in the middle ear. It is responsible for maintaining the body's balance. Gravitational pull on the otoliths causes them to constantly appraise the nervous system of the position of the head with respect to the direction of gravity. The major objective is to determine how the body, which receives partially redundant information from several sensory mechanisms, reorganizes to account for the loss of usable information from one channel (the vestibular system) because of an environmental variation (loss of gravity). A second experiment objective is…
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Space Motion Sickness and Vestibular Experiments in Spacelab

Dept. of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA-Charles M. Oman
Published 1982-02-01 by SAE International in United States
Approximately 43 percent of Apollo, Skylab, Soyuz/Salyut and Shuttle crewmen have experienced symptoms resembling motion sickness during their first several days in space. This paper reviews the the space sickness problem in both an operational and physiological context, and describes experiments planned by a team of vestibular researchers from the USA and Canada to study apace sickness and associated sensory-motor adaptation to weightlessness during Spacelab missions 1 and 4, and the German Spacelab mission D-1.
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