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  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • 1
    Publication Date: 2019-06-28
    Description: Since Seasat carried the Scanning Multichannel Microwave Radiometer (SMMR) into space, shortly followed by the SMMR on Nimbus 7, a new type of data source on atmospheric water vapor and other meteorological parameters has been available for analysis of weather systems over the ocean. Since 1987, the Scanning Multichannel Microwave/Imager (SMM/I) has provided similar data. A collection of work using this data is presented.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-190342 , NAS 1.26:190342
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Description: Based on a geometric optics model and the assumption of an isotropic Gaussian surface slope distribution, the component of ocean surface microwave emissivity variation due to large-scale surface roughness is parameterized for the frequencies and approximate viewing angle of the Special Sensor Microwave/Imager. Independent geophysical variables in the parameterization are the effective (microwave frequency dependent) slope variance and the sea surface temperature. Using the same physical model, the change in the effective zenith angle of reflected sky radiation arising from large-scale roughness is also parameterized. Independent geophysical variables in this parameterization are the effective slope variance and the atmospheric optical depth at the frequency in question. Both of the above model-based parameterizations are intended for use in conjunction with empirical parameterizations relating effective slope variance and foam coverage to near-surface wind speed. These empirical parameterizations are the subject of a separate paper.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Journal of Atmospheric and Oceanic Technology (ISSN 0739-0572); 11; 3; p. 617-628
    Format: text
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