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  • ELECTRONIC SYSTEMS  (3)
  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (2)
  • 1
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    Measurement of ocular counterrolling /OCR/ by polarized light (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The assessment of the activation of the otolith gravitoinertial sensors in the vestibular system of the inner ear may be accomplished by observing the occular counterrolling (OCR) movements which rotate the eyes about the line of sight. A method is presented for the continuous measurement of OCR by means of polarized light, a system of polarizers, and a contact lens. A polarized hard contact lens is placed between two soft lenses before application to the eye, and the measured phase difference between the incident rotating polarized light and the reflected light from this lens provides readings uncontaminated by other eye movement modes.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: Polarizers and applications; Aug 27, 1981 - Aug 28, 1981; San Diego, CA
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    NASA TECHNICAL REPORTS
  • 2
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    MIT-NASA/KSC space life science experiments - A telescience testbed (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Experiments performed at MIT to better define Space Station information system telescience requirements for effective remote coaching of astronauts by principal investigators (PI) on the ground are described. The experiments were conducted via satellite video, data, and voice links to surrogate crewmembers working in a laboratory at NASA's Kennedy Space Center. Teams of two PIs and two crewmembers performed two different space life sciences experiments. During 19 three-hour interactive sessions, a variety of test conditions were explored. Since bit rate limits are necessarily imposed on Space Station video experiments surveillance video was varied down to 50 Kb/s and the effectiveness of PI controlled frame rate, resolution, grey scale, and color decimation was investigated. It is concluded that remote coaching by voice works and that dedicated crew-PI voice loops would be of great value on the Space Station.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: AAS PAPER 90-002 , Annual Rocky Mountain Guidance and Control Conference; Feb 03, 1990 - Feb 07, 1990; Keystone, CO; United States
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    NASA TECHNICAL REPORTS
  • 3
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    Digital-Difference Processing For Collision Avoidance. (1988)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: Digital system for automotive crash avoidance measures and displays difference in frequency between two sinusoidal input signals of slightly different frequencies. Designed for use with Doppler radars. Characterized as digital mixer coupled to frequency counter measuring difference frequency in mixer output. Technique determines target path mathematically. Used for tracking cars, missiles, bullets, baseballs, and other fast-moving objects.
    Keywords: ELECTRONIC SYSTEMS
    Type: MSC-20865 , NASA Tech Briefs (ISSN 0145-319X); 12; 3; P. 28
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    NASA TECHNICAL REPORTS
  • 4
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    Microwave Deflection Sensor (1988)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: Doppler-radar instrument measures small deflections or vibrations of reflecting surface. Acting as interferometric micrometer, instrument includes combination of analog and digital circuits measuring change in phase of radar return due to movement of reflecting surface along signal-propagation path. Includes homodyne Doppler-radar transceiver and digital signal-processing circuitry to measure change in phase shift as target deflects.
    Keywords: ELECTRONIC SYSTEMS
    Type: MSC-20974 , NASA Tech Briefs (ISSN 0145-319X); 12; 11; P. 36
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    NASA TECHNICAL REPORTS
  • 5
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    Transponder System for High-Frequency Ranging (1986)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: Transponder system uses phase difference between transmitted and reflected high-frequency radio waves to measure distance to target. To suppress spurious measurements of reflections from objects near target at transmitted frequency and its harmonics, transponder at target generates return signal at half transmitted frequency. System useful in such applications as surveying, docking of ships, and short-range navigation.
    Keywords: ELECTRONIC SYSTEMS
    Type: MSC-20912 , NASA Tech Briefs (ISSN 0145-319X); 10; 5; P. 54
    Format: text
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    NASA TECHNICAL REPORTS
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