摘要 :
Attempts at devising training simulator out-the-window 'night time' displays that can be effectively used by a night vision goggle (NVG)- wearing trainee have yielded NVG display systems of questionable fidelity, stability, and/or...
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Attempts at devising training simulator out-the-window 'night time' displays that can be effectively used by a night vision goggle (NVG)- wearing trainee have yielded NVG display systems of questionable fidelity, stability, and/or repeatability. The 'physics-based' approach reported here first characterizes a display in terms of its absolute dynamic output range for night vision imaging system (NVIS) radiance and then, using that characterization, maps, as possible, to-be-displayed NVIS radiance values of simulated scene objects on to the display itself. Treatment of NVG-specific phenomena, such as 'halos,' is discussed, as are considerations of NVIS cross-illumination in multiscreen displays. Modifications to an existing NVG simulation software module (SensorHost) to accommodate display of NVIS radiance are described. Example NVIS characterizations of various off-the-shelf simulator display systems are detailed.
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摘要 :
Eight experienced US Army aviators performed various maneuvers in an instrumented helicopter to test the relative usability of two bifocally configured night vision goggles. Both configurations were statistically better than the u...
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Eight experienced US Army aviators performed various maneuvers in an instrumented helicopter to test the relative usability of two bifocally configured night vision goggles. Both configurations were statistically better than the unmodified arrangement when looking at a pilot's ability to hold a precise altitude at night. The subjective data, supported by flight performance observed betweeen the two bifocals, further suggested that a 24% bifocal version was more desirable than a 14% configuration. The inference is that the reduced inside field-of-view presented by the 14% bifocal interferes with a pilot's ability to rapidly locate instruments once he has directed his attention inside the cockpit. (Author)
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摘要 :
This report was prepared to provide the aviator, crew member, commander, and others involved in NVG operations, training, and development with information on night vision flying. It is not nor is it intended to be a how to report.
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Accurate perception of position and self-movement is a critical factor for many tasks in aviation; particularly low-level flight, take off and landing. An especially demanding task of this kind is that of deck landings for rotary-...
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Accurate perception of position and self-movement is a critical factor for many tasks in aviation; particularly low-level flight, take off and landing. An especially demanding task of this kind is that of deck landings for rotary-wing aircraft, which are often conducted during the night. During night operations, ship-based lighting is used to assist the aircrew and flight-deck staff in the conduct of take-off and landing. While reasonably effective, the lighting systems currently employed by the Royal Australian Navy (RAN) were not designed specifically with the aim of enhancing aircrew visual perception. In two experiments a deck-edge light (DEL) system which provides a richer visual cueing environment for the aircrew than traditional point-source lighting systems was investigated in terms of its potential benefits for aircrew visual perception. These experiments could reveal no clear performance advantage for DELs over standard point-source lights. In both experiments, participants were asked to make ratings of their confidence in their judgments. Only a very weak relationship was found between accuracy and confidence, suggesting that care should be exercised when subjective ratings are interpreted in place of performance data. Further investigation is required in order to understand the potential of DEL systems for enhancing the safety of night operations.
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There is a critical requirement for conducting Army combat flight operations at terrain altitudes (including nap-of-the-earth (NOE)) at night. Current courses of instruction are inadequate in training for the accomplishment of tha...
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There is a critical requirement for conducting Army combat flight operations at terrain altitudes (including nap-of-the-earth (NOE)) at night. Current courses of instruction are inadequate in training for the accomplishment of that requirement. This report describes the development of a course that will provide instruction to assist in meeting that requirement. This course is developed to be a night navigation and map/terrain interpretation course using unaided (naked eye) and aided (Night Vision Goggles) vision techniques (MITANN). (Author)
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A flight test was conducted to assess any differences in pilot-vehicle performance and pilot opinion between the use of a current generation night vision goggle (the AVS-9) and one variant of the prototype panoramic night vision g...
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A flight test was conducted to assess any differences in pilot-vehicle performance and pilot opinion between the use of a current generation night vision goggle (the AVS-9) and one variant of the prototype panoramic night vision goggle (the PNVGII). The panoramic goggle has more than double the horizontal field-of-view of the AVS-9, but reduced image quality. Overall the panoramic goggles compared well to the AVS-9 goggles. However, pilot comment and data are consistent with the assertion that some of the benefits of additional field-of-view with the panoramic goggles were negated by the reduced image quality of the particular variant of the panoramic goggles tested.
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Low capital cost of a lighting system for VFR night operations at secondary airfields can be achieved using a three-fold design approach. This design approach employs pulsed incandescent lamps in place of xenon flash tubes, and su...
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Low capital cost of a lighting system for VFR night operations at secondary airfields can be achieved using a three-fold design approach. This design approach employs pulsed incandescent lamps in place of xenon flash tubes, and substitutes fluorescent lights for steady burning incandescent sources when feasible. In addition, it sizes wind indicators to the legibility needs of typical secondary airport operations. The major components of the lighting system described in the report include runway edge lights, steady burning approach and threshold lights, wind tee, rotating beacon, glide slope indicator, and obstruction lights. A field test of the prototype is recommended to evaluate the operational usefulness of the low cost lighting. Also recommended, is the initiation of a new wind indicator design, based on the minimum resolution of wind speed and direction needed for secondary airport operations. (Author)
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摘要 :
This volume contains computer programs used to analyze the subject data, procedures for the use of the programs, and example outputs. These programs are the result of a theoretical investigation of analytic methods for deriving di...
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This volume contains computer programs used to analyze the subject data, procedures for the use of the programs, and example outputs. These programs are the result of a theoretical investigation of analytic methods for deriving differential weighting functions from preselected samples of multivariate, time sequenced observations of aircrew performance. The research effort resulted in an analytic model which could be used to prepare and to further investigate differential weighting functions as a means of establishing relationships between time sequenced observations of aircrew performance and independent assessments of aircrew proficiency.
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摘要 :
This volume contains computer programs used to analyze the subject data, procedures for the use of the programs, and example outputs. These programs are the result of a theoretical investigation of analytic methods for deriving di...
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This volume contains computer programs used to analyze the subject data, procedures for the use of the programs, and example outputs. These programs are the result of a theoretical investigation of analytic methods for deriving differential weighting functions from preselected samples of multivariate, time sequenced observations of aircrew performance. The research effort resulted in an analytic model which could be used to prepare and to further investigate differential weighting functions as a means of establishing relationships between time sequenced observations of aircrew performance and independent assessments of aircrew proficiency.
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