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  • 1
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    ROTRAN 1 - SOLUTION OF EQUATIONS FOR ROTARY TRANSFORMERS (1994)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: ROTRAN1 is a computer program to calculate the impedance and current gain of a simple transformer. Inputs to the program are primary resistance, primary inductance, secondary (load) resistance, secondary inductance, and mutual inductance. ROTRAN1 was written in BASICA for execution on the IBM PC personal computer. It was written in 1986.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NPO-17697
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    ASTROS - A sub-arcsec CCD star tracker (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The design and application of ASTROS (Advanced Star and Target Reference Optical Sensor) are described, with emphasis on performance test results acquired with a prototype system. The ASTROS tracker provides extremely precise measurements of star image coordinates as inputs to the Image Motion Compensation (IMC) system used to stabilize the science instrument focal planes. Performance levels achieved are dramatic improvements over the levels achieved with image dissector designs with comparable fields of view.
    Keywords: SPACECRAFT INSTRUMENTATION
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Isolation Mounting for Charge-Coupled Devices (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: CCD's suspended by wires under tension. Remote thermoelectric cooling of charge coupled device allows vibration isolating mounting of CCD assembly alone, without having to suspend entire mass and bulk of thermoelectric module. Mounting hardware simple and light. Developed for charge-coupled devices (CCD's) in infrared telescope support adaptable to sensors in variety of environments, e.g., sensors in nuclear reactors, engine exhausts and plasma chambers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-15551 , NASA Tech Briefs (ISSN 0145-319X); 8; 3; P. 316
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Programmable scan/read circuitry for charge coupled device imaging detectors (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A circuit for scanning and outputting the induced charges in a solid state charge coupled device (CCD) image detector is disclosed in an image detection system for use in a spacecraft attitude control system. The image detection system includes timing control circuitry for selectively controlling the output of the CCD detector so that video outputs are provided only with respect to induced charges corresponding to predetermined sensing element lines of the CCD detector. The timing control circuit and the analog to digital converter are controlled by a programmed microprocessor which defines the video outputs to be converted and further controls the timing control circuit so that no video outputs are provided during the delay associated with analog to digital conversion.
    Keywords: OPTICS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Quicker Selection of CCD Images (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Microprocessor limits analog-to-digital conversion to image areas of interest. Image region of interest selected in order of brightness by use of threshold detectors and their coordinates stored by microprocessor for tracking.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-15345 , NASA Tech Briefs (ISSN 0145-319X); 8; 4; P. 478
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Design and performance of a fiber optic gyroscope using integrated optics (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Navigation grade fiber optic rotation sensors (FORS) are being developed as an alternative to spinning mass gyro's for unmanned planetary exploration spacecraft. FORS is attractive because of its many advantages such as long life, low weight, low power, and low cost as compared to its mechanical counterparts. FORS incorporates an advanced integrated optics circuit. The advanced eight-component integrated optics circuit performs all the key signal processing functions and in addition incorporates a unique optical beat detection circuit thereby providing an output in the form of pulses proportional to incremental angular position similar to a ring laser gyro (RLG) but without the inherent lock-in problem RLG's possess.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Fiber Optic and Laser Sensors VII; Sept. 5-7, 1989; Boston, MA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Applications of slow-scan television systems to planetary exploration (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Slow scan TV systems for planetary exploration, discussing sampled vidicon operation, digital encoding, data storage, signal to noise ratio, future design trends, etc
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: SMPTE PREPRINT 106-3
    Format: text
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  • 8
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    Applications of slow-scan television systems to planetary exploration (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Slow scan TV systems for planetary exploration, discussing sampled vidicon operation, digital encoding, data storage, signal to noise ratio, future design trends, etc
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: SMPTE PREPRINT 106-3 , ; STITUTION OF ENGINEE
    Format: text
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  • 9
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    Data-storage compression scheme (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: System uses scheme which does not respond to redundant data. Encoded sensor output signals are transferred to central processing unit only when change occurs in encoded 12-bit word.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-13488 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 24
    Format: text
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  • 10
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    A strapdown star tracker for space vehicle attitude control. (1967)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Strapdown star tracker for space vehicle attitude control, using scanning and error-signal determination method
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 67-551
    Format: text
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