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  • General Chemistry  (4.740)
  • Inorganic Chemistry  (3.865)
  • COMMUNICATIONS  (1.377)
  • 1970-1974  (9.982)
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  • 1
    facet.materialart.
    Unbekannt
    In:  CASI
    Publikationsdatum: 2019-08-28
    Beschreibung: Criteria and recommended practices for the design of the spaceborne elements of electronic imaging systems are presented. A spaceborne electronic imaging system is defined as a device that collects energy in some portion of the electromagnetic spectrum with detector(s) whose direct output is an electrical signal that can be processed (using direct transmission or delayed transmission after recording) to form a pictorial image. This definition encompasses both image tube systems and scanning point-detector systems. The intent was to collect the design experience and recommended practice of the several systems possessing the common denominator of acquiring images from space electronically and to maintain the system viewpoint rather than pursuing specialization in devices. The devices may be markedly different physically, but each was designed to provide a particular type of image within particular limitations. Performance parameters which determine the type of system selected for a given mission and which influence the design include: Sensitivity, Resolution, Dynamic range, Spectral response, Frame rate/bandwidth, Optics compatibility, Image motion, Radiation resistance, Size, Weight, Power, and Reliability.
    Schlagwort(e): COMMUNICATIONS
    Materialart: NASA-SP-8078
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    facet.materialart.
    Unbekannt
    In:  CASI
    Publikationsdatum: 2019-08-28
    Beschreibung: Electronic signal generator data based on solid state concepts were simplified or refined to meet requirements, such as reliability, simplicity, fail-safe characteristics, and the capability of withstanding environmental extremes. Pulse generators, high voltage pulse generators, oscillators, analog signal generators, square wave signal generators, and special function signal generators are described.
    Schlagwort(e): COMMUNICATIONS
    Materialart: NASA-SP-5946(01)
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    facet.materialart.
    Unbekannt
    In:  CASI
    Publikationsdatum: 2019-08-28
    Beschreibung: Microwave antenna tracking system performance
    Schlagwort(e): COMMUNICATIONS
    Materialart: NASA-SP-5935/01/
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    facet.materialart.
    Unbekannt
    In:  CASI
    Publikationsdatum: 2019-08-14
    Beschreibung: Millimeter wave antenna system for spacecraft use
    Schlagwort(e): COMMUNICATIONS
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2019-08-13
    Beschreibung: Description of a very accurately controlled receiver for monitoring the electromagnetic radiations in both existing and projected space communication bands. Based on analysis of the existing and projected space communication bands, 108 to 174 MHz, 240 to 478 MHz, and 1535 to 1665 MHz were covered. The receiver achieves accurate control via a digitally tuned synthesizer and a wide range of digital control including frequency band coverage and gain control selection. Digital memory was provided to store 16 separate digital command instructions which can be programmed via a command data link. The receiver provides for transmission to the ground of both a predetection signal and signals in digital format, which in turn, were provided by sampling and analog-to-digital conversions.
    Schlagwort(e): COMMUNICATIONS
    Materialart: International Telemetering Conference; Oct 09, 1973 - Oct 11, 1973; Washington, DC
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    facet.materialart.
    Unbekannt
    In:  Other Sources
    Publikationsdatum: 2019-08-13
    Beschreibung: Brief review of the history of telemetering since the end of World War II, and discussion of telemetering needs and trends of the 1970's and 1980's. The shift in emphasis from quantity of flight equipments having relatively short lifetimes to quality of flight equipments having very long lifetimes is shown to characterize the main change from the 1960's to the 1970's in telemetering needs. Looking to the 1980's, the possibility is envisioned of the establishment of orbiting space stations capable of generating 1 to 10 trillion digital bits per day.
    Schlagwort(e): COMMUNICATIONS
    Materialart: International Telemetering Conference; Oct 10, 1972 - Oct 12, 1972; Los Angeles, CA
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    facet.materialart.
    Unbekannt
    In:  Other Sources
    Publikationsdatum: 2019-08-13
    Beschreibung: Skylab is an experimental manned space station which will be operated by three astronauts intermittently over eight months in 1973. It will be in a 235 nautical mile, 50 degree inclination orbit. The communication system includes an onboard audio distribution hard-line network with 13 stations; a teleprinter for recording messages from the ground; telemetry, voice and television links; an onboard video distribution network. The radio frequencies system also includes radiometer and scatterometer earth-scanning sensors operating at 13.9 GHz and 1.4 GHz. The overall Skylab Program is discussed briefly and the communications system is described in more detail.
    Schlagwort(e): COMMUNICATIONS
    Materialart: AIAA PAPER 72-543 , American Institute of Aeronautics and Astronautics, Communications Satellite Systems Conference; Apr 24, 1972 - Apr 26, 1972; Washington, DC
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    facet.materialart.
    Unbekannt
    In:  Other Sources
    Publikationsdatum: 2019-08-13
    Beschreibung: Four experimental systems involving use of specific capabilities of applications technology satellites are discussed. These experimental systems are illustrative of potential operational systems based on satellites capable of producing relatively large power fluxes.
    Schlagwort(e): COMMUNICATIONS
    Materialart: AIAA PAPER 72-578 , American Institute of Aeronautics and Astronautics, Communications Satellite Systems Conference; Apr 24, 1972 - Apr 26, 1972; Washington, DC
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    facet.materialart.
    Unbekannt
    In:  Other Sources
    Publikationsdatum: 2019-08-13
    Beschreibung: The test facilities used in the experiment consisted of a ground station, a balloon platform, radar tracking stations, and a test aircraft. As a direct result of the experiment, several modifications have been incorporated into the equipment. The two most important modifications were the introduction of a 10-sec delay into the search mode and the use of differentially coded phase shift keying for the data channel.
    Schlagwort(e): COMMUNICATIONS
    Materialart: International Conference on Satellite systems for mobile communications and surveillance; Mar 13, 1973 - Mar 15, 1973; London
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Publikationsdatum: 2019-07-20
    Beschreibung: Rectangular fence guides for millimeter wave transmission
    Schlagwort(e): COMMUNICATIONS
    Materialart: NASA-CR-121856 , PR-B
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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