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  • 1
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    Pioneer Venus wind experiment receiver (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The final design of the Pioneer Venus Wind Experiment Receiver and Phase Calibrator is discussed from the block diagram viewpoint. Measured phase data are shown to derive the predicted performance. The STDN receiver implementation is also discussed.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: The Deep Space Network; p 141-147
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Multi-Mission Receiver (MMR) (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: An introduction to the Multi-Mission Receiver (MMR) is presented. The MMR contains occultation receiver channels (OCC) and very long baseline interferometry channels. The design considerations, performance and implementation of the OCC channels are discussed.
    Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
    Type: The Deep Space Network; p 75-81
    Format: text
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  • 3
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    ORION downconverter and power supply (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The receiver subsystem supplies the front end assembly (downconverter) and power supply for the ORION Mobile Station. These assemblies are designed to withstand severe environmental conditions. The mechanical, electronic, environmental and maintenance design considerations encountered during the design phase of this project are discussed. The two channel S/X downconverter has a 400 MHz bandwidth channel. Phase stability of 2 and 7 deg at S- and X-bands, respectively, is achieved with a temperature stabilized first local oscillator.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: The Telecommun. and Data Acquisition Rept.; p 3-9
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Impurity conduction in the intermediate concentration region (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-31
    Keywords: unknown
    Format: text
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  • 5
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    Impurity conduction in the intermediate concentration region. (1965)
    In:  Other Sources
    Details
    Publication Date: 2019-05-24
    Description: Activation energy and impurity conduction in antimony doped germanium in intermediate impurity concentration based on negative ion D band
    Keywords: PHYSICS, SOLID-STATE
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  • 6
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    Excitation cross sections for krypton by electrons in the 15-100-eV impact-energy range (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Differential, integral, and momentum-transfer cross sections have been determined for the excitation of the 24 lowest electronic states of Kr (some of the transitions are unresolved). The inelastic-scattering cross sections were normalized to the absolute scale with the help of the elastic-scattering differential cross sections (DCS's) which in turn were normalized with respect to absolute He DCS's. The impact energies were 15, 20, 30, 50, and 100 eV and the DCS's were obtained over the range of 5-135 deg scattering angles. The error limits associated with the differential, integral, and momentum-transfer cross sections have been estimated at 25%, 38%, and 46%, respectively.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Physical Review A - General Physics; vol. 23
    Format: text
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  • 7
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    Elastic scattering and vibrational excitation of CO2 by 4, 10, 20 and 50 eV electrons (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Elastic and vibrationally inelastic differential, integral and momentum-transfer cross sections for electrons scattered by CO2 molecules are reported at 4, 10, 20 and 50 eV impact energies. The elastic cross sections are placed on an absolute scale by means of a relative flow technique. The inelastic cross sections are normalised to the elastic ones by using the inelastic to elastic intensity ratios. Data are reported for up to ten features in the 0.0 to 0.4 eV energy-loss region.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Journal of Physics B - Atomic and Molecular Physics; 13; Apr. 28
    Format: text
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  • 8
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    Electron energy-loss spectra in molecular fluorine (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Electron energy-loss spectra in molecular fluorine, for energy losses from 0 to 17.0 eV, have been taken at incident electron energies of 30, 50, and 90 eV and scattering angles from 5 to 140 deg. Features in the spectra above 11.5 eV energy loss agree well with the assignments recently made from optical spectroscopy. Excitations of many of the eleven repulsive valence excited electronic states are observed and their location correlates reasonably well with recent theoretical results. Several of these excitations have been observed for the first time and four features, for which there are no identifications, appear in the spectra.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Journal of Chemical Physics; 71; Dec. 15
    Format: text
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  • 9
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    Operational radio interferometry observation network (ORION) mobile VLBI station (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The design and current status of the ORION mobile VLBI station is described. The station consists of a five-meter antenna, a receiving and recording system installed in a mobile antenna transporter, and an electronics transporter. The station is designed for field operation by a two-person crew at the rate of two sites per week. The various subsystems are described in detail, including the antenna, housing facilities for electronics and crew, microwave equipment, receiver, data acquisition subsystem, frequency and timing subsystem, phase calibration, monitoring and control, water vapor radiometer, and communications.
    Keywords: GEOPHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Hot isostatic pressing of silicon nitride Sisub3n4 containing zircon, or zirconia and silica (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A hydrothermal synthesis apparatus with a 10 KB cylinder was used to obtain a sintered body of silicon nitride. The sintering auxiliary agents used were zircon (ZrSiO4) and a mixture of zirconia (ZrO2) and silica (SiO2). Experiments were conducted with the amounts of ZrSi04 or ArO2 and SiO2 varying over a wide range and the results compared to discover the quantity of additive which produced sintering in silicon nitride by the hot pressing method.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-TM-75880
    Format: application/pdf
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