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  • 1
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    Airborne wavemeter validation and calibration (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: This manuscript outlines a continuing effort to validate and verify the performance of an airborne autonomous wavemeter for tuning solid state lasers to a desired wavelength. The application is measuring the vertical profiles of atmospheric water vapor using a differential absorption lidar (DIAL) technique. Improved wavemeter performance data for varying ambient temperatures are presented. This resulted when the electronic grounding and shielding were improved. The results with short pulse duration lasers are also included. These lasers show that similar performance could be obtained with lasers operating in the continuous and the pulsed domains.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: In: Laser interferometry IV: Computer-aided interferometry; Proceedings of the Meeting, San Diego, CA, July 22-24, 1991 (A93-44185 18-35); p. 110-116.
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Lidar In-space Technology Experiment (LITE) Electronics Overview (1992)
    In:  CASI
    Details
    Publication Date: 2014-09-24
    Description: The LITE electronics system consists of the following seven subsystems: Laser Transmitter Module (LTM), Boresight Assembly (BA), Aft-Optics Electronics (AOE), Digital Data Handling Unit (DDHU), Engineering Data System (EDS), Instrument Controller (IC), and the Ground Support Equipment (GSE). Each of these subsystems is discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Sixteenth International Laser Radar Conference, Part 1; p 129-132
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Programmable Analog-To-Digital Converter (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: High-speed analog-to-digital converter with programmable voltage steps that can be changed during operation. Allows concentration of converter resolution over specific portion of waveform. Particularly useful in digitizing wind-shear radar and lidar return signals, in digital oscilloscopes, and other applications in which desirable to increase digital resolution over specific area of waveform while accepting lower resolution over rest of waveform. Effective increase in dynamic range achieved without increase in number of analog-to-digital converter bits. Enabling faster analog-to-digital conversion.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-14765 , NASA Tech Briefs (ISSN 0145-319X); 17; 10; P. 41
    Format: text
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    NASA TECHNICAL REPORTS
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