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  • Other Sources  (4)
  • METEOROLOGY AND CLIMATOLOGY  (4)
  • Environment Pollution
  • Lunar and Planetary Science and Exploration
  • 1980-1984  (4)
  • 1
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    The estimation of convective precipitation from GOES imagery with the Griffith/Woodley technique (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Improved rainfall monitoring using satellite and conventional data are described. A method was developed to: (1) provide rainfall evaluations more uniform, accurate and complete than can be derived from satellite or conventional data alone; (2) serve current operational environmental program in countries with special needs for improved rainfall data; (3) invoke either polar orbiting and/or geostationary imagery as the satellite inputs; (4) utilize global telecommunication system (GTS) SYNOP messages as the basic conventional data inputs; (5) be applicable to any and all types of weather situations in the operational areas; (6) be undemanding in hardware and software so as to be an option available for use even by nations or agencies with very limited financial resources.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center Precipitation Meas. from Space:; 6 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A standard verification for rainfall estimation from remote platforms (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Measurements of reflectivity at horizontal (Zh) and vertical (Zy) polarizations provide adequate information necessary to infer the two parameters of an exponential raindrop size distribution (No, Do) where the distribution is given by N(D) = Noexp(-3.67 D/Do). This distribution enables computation of water content or still air rainfall rates. The physical basis of the radar technique is outlined and illustrated theoretically, and experimental results, comparing radar derived rainfall rates with raingage and disdrometer measurements, are reviewed. The technique is useful for many meteorological and hydrological purposes, including ground truth measurements of rainfall rate over the ocean for comparison with satellite related observations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center Precipitation Meas. from Space:; 4 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Visible and infrared techniques (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Time-dependent indexing schemes and time-dependent life-history techniques are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Precipitation Meas. from Space:; 10 p
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Infrared radiative properties of tropical cirrus clouds inferred with aircraft measurements (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Longwave emissivities and the vertical profile of cooling rates of tropical cirrus clouds are determined using broadband hemispheric irradiance data. Additionally, a broadband mass absorption coefficient is defined and used to relate emissivity to water content. The data used were collected by the National Center for Atmospheric Research (NCAR) Sabreliner during the GARP Atlantic Tropical Experiment (GATE) in the summer of 1974. Three case studies are analyzed showing that these tropical cirrus clouds approached an emissivity of 1.0 within a vertical distance of 1.0 km. Broadband mass absorption coefficients ranging from 0.076 to 0.096 sq m per g are derived. A comparison of these results with other work suggests that tropical cirrus cloud emissivities may be significantly larger than heretofore believed. Ice water content of the clouds were deduced from data collected by a one-dimensional particle spectrometer. Analyses of the ice water content and the observed particle size distributions are presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 37; May 1980
    Format: text
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    NASA TECHNICAL REPORTS
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