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  • General Chemistry  (1,699)
  • Organic Chemistry  (1,360)
  • ASTROPHYSICS  (1,280)
  • METEOROLOGY AND CLIMATOLOGY  (843)
  • Humans
  • 1980-1984  (5,865)
  • 1984  (3,073)
  • 1981  (2,792)
Collection
Keywords
Publisher
Years
  • 1980-1984  (5,865)
Year
  • 1
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    Calculation of the attenuation and phase displacement per unit of length due to rain composed of ellipsoidal drops (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: All of the phenomena which influence the propagation of radiowaves at frequencies above 10 GHz (attenuation, depolarization, scintillation) can by intensified by parameters directly derived from a solution of individual scatter, naturally in addition to be meteorological elements which characterize the physical medium. The diffusion caused by rainy precipitation was studied using Mie's algorithm for rain composed of spherical drops, and Oguchi's algorithm for rain composed of drops in an ellipsoidal form with axes of rotational symmetry arrange along the vertical line of a generic reference point. Specific phase displacement and attenuation along the principal planes, propagation of radiowaves in generic polarization, and propagation with inclined axes are also considered.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-76592 , RIF-1B1778
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NASA/NOAA/USAID implementation of the South Pacific severe storm detection and warning system project (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Implementation by NASA of the South Pacific severe storm detection and warning system project for the Fiji Meteorological Service (FMS) in Nadi, Fiji, is discussed. A description of the need and use of the system by the FMS, of data reception, of interactive computer techniques, of training, and of the benefits to be derived from implementation of the system is given. The project allows precise tracking of all South Pacific tropical cyclones with frequent high-resolution reception of both the Japanese GMS and the U.S. GOES-West visible and IR cloud images.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Advances in Space Research (ISSN 0273-1177); 4; 11, 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The detection and location of lightning from space (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A lightning mapper sensor was conceived for detecting and locating lightning over large areas of the earth's surface, taking into account also a measurement of the radiant energy and a recording of the time of lightning occurrence. The considered device will basically be a calibrated lightning imager. The type of information provided is currently not available on a large scale basis. By using the mapper, scientists will, for the first time, be able to study the electrosphere from scales on the order of the earth's diameter down to the size of individual storms (10 km). Attention is given to details regarding the sensor components, and questions of sensor performance.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Conference on Satellite/Remote Sensing and Applications; Jun 25, 1984 - Jun 29, 1984; Clearwater Beach, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Wind shear measuring on board an airliner (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A measurement technique which continuously determines the wind vector on board an airliner during takeoff and landing is introduced. Its implementation is intended to deliver sufficient statistical background concerning low frequency wind changes in the atmospheric boundary layer and extended knowledge about deterministic wind shear modeling. The wind measurement scheme is described and the adaptation of apparatus onboard an A300 airbus is shown. Preliminary measurements made during level flight demonstrate the validity of the method.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-77463 , NAS 1.15:77463 , DFVLR-MITT-80-09 , Mar 26, 1980 - Mar 27, 1980; Aachen; Germany
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Remote sensing of atmospheric particulates: Technological innovation and physical limitations in applications to short-range weather prediction (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Techniques for remote sensing of particles, from cloud droplet to hailstone size, using optical and microwave frequencies are reviewed. The inherent variability of atmospheric particulates is examined to delineate conditions when the signal can give information to be effectively utilized in a forecasting context. The physical limitations resulting from the phase, size, orientation and concentration variability of the particulates are assessed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NSF ATM-82-09684 , NSF ATM-82-18349 , ESA Nowcasting 2. Mesoscale Observations and Very-Short-Range Weather Forecasting; p 159-164
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Infrared emission from M31 (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Maps of M31 have been obtained at wavelengths of 12, 25, 60, and 100 microns. Emission is detected from the center and from a ring of 50 arcmin radius. The ring is that also seen in H I, in H II, and in radio continuum radiation. The spectrum of the central emission suggests a hotter dust temperature than in the ring. M31 is a weak infrared source, the radiation measured longward of 12 microns being only 3 percent of its total luminosity. The two closest companion galaxies, M32 and NGC 205, have also been detected.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 278; L59-L62
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Infrared cirrus - New components of the extended infrared emission (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Extended sources of far-infrared emission superposed on the zodiacal and galactic backgrounds are found at high galactic latitudes and near the ecliptic plane. Clouds of interstellar dust at color temperatures as high as 35 K account for much of this complex structure, but the relationship to H I column density is not simple. Other features of the extended emission show the existence of warm structures within the solar system. Three bands of dust clouds at temperatures of 150-200 K appear within 10 deg on both sides of the ecliptic plane. Their ecliptic latitudes and derived distances suggest that they are associated with the main asteroid belt. A third component of the 100-micron cirrus, poorly correlated with H I, may represent cold material in the outer solar system or a new component of the interstellar medium.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 278; L19-L22
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Gamma Ray Astrophysics: New insight into the universe (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Gamma ray observations of the solar system, the galaxy and extragalactic radiation are reported. Topics include: planets, comets, and asteroids; solar observations; interstellar medium and galactic structure; compact objects; cosmology; and diffuse radiation. The instrumentation used in gamma ray astronomy in covered along with techniques for the analysis of observational spectra.
    Keywords: ASTROPHYSICS
    Type: NASA-SP-453 , NAS 1.21:453 , LC-81-600116
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Evaluation of photogrammetric flight under icing conditions on March 23, 1978 (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: In a double passage through a route laid out in a stagnation zone of the Bavarian forest, it was found that the stagnation and attendant elevation increases the danger of icing. Conversely, it turned out that formation of precipitation reduces the icing intensity. A comparison of both factors showed: the reduction of ice formation through precipitation equals the increase due to stagnation, or even exceeds it.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-76617
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Measurement of characteristics of lightning at high altitudes (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: New development in aeronautical technology -- the use of composite materials, new electronic components, electric flight controls -- have made aircraft potentially more and more vulnerable to the effects of lightning. In-flight tests were conducted to evaluate the current in a bolt of lightning, to measure voltage surge in the onboard circuitry and in certain pieces of equipment, and to document the relationship lightning bolt current and the voltage surge so as to develop a theoretical model and thuds to become acquainted with the significant
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-76669
    Format: application/pdf
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