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  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • OCEANOGRAPHY  (2)
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  • 1
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    Microwave radiometer studies of atmospheric water over the oceans, volume 1 (1992)
    In:  CASI
    Details
    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
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    The response of the SSM/I to the marine environment. Part 2: A parameterization of the effect of the sea surface slope distribution on emission and reflection (1994)
    In:  Other Sources
    Details
    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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  • 3
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    Air-sea interaction and remote sensing (1992)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The first part of the proposed research was a joint effort between our group and the Applied Physics Laboratory (APL), University of Washington. Our own research goal is to investigate the relation between the air-sea exchange processes and the sea state over the open ocean and to compare these findings with our previous results obtained over a small body of water namely, Lake Washington. The goals of the APL researchers are to study (1) the infrared sea surface temperature (SST) signature of breaking waves and surface slicks, and (2) microwave and acoustic scattering from water surface. The task of our group in this joint effort is to conduct measurements of surface fluxes (of momentum, sensible heat, and water vapor) and atmospheric radiation (longwave and shortwave) to achieve our research goal as well as to provide crucial complementary data for the APL studies. The progress of the project is summarized.
    Keywords: OCEANOGRAPHY
    Type: NASA-CR-190913 , NAS 1.26:190913
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  • 4
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    Identification of atmospheric fronts over the ocean with microwave measurements of water vapor and rain (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper describes some basic research techniques and algorithms developed to diagnose fronts in cyclonic storms over the ocean with data from satellite-borne microwave radiometers. Methods are developed for flagging strong gradients in integrated atmospheric water vapor and the presence of rain by using data from the SSMR on board the polar orbiting Seasat and Nimbus-7 satellites. Examination of 65 frontal systems showed that the water vapor gradient flag correctly identified 86 percent of the fronts, while the precipitation flagged 91 percent. The two types of flags emphasize different portions of the cyclone and are therefore complementary. Ultimately, these techniques are intended for operational use with data from the Special Sensor Microwave Imager which was launched in June 1987 on a satellite in the Defense Meteorological Satellite Program (DMSP).
    Keywords: OCEANOGRAPHY
    Type: Weather and Forecasting (ISSN 0882-8156); 4; 449-460
    Format: text
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