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  • INSTRUMENTATION AND PHOTOGRAPHY  (2)
  • OCEANOGRAPHY  (2)
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  • 1
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    In-situ measurements for validation of microwave data - Problems, accuracies (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This review covers the relationship between remotely sensed microwave data and data obtained in situ or from earth-based remote-sensing systems, both for validation of algorithms and as supplemental information for deriving a geophysical quantity. Parameters obtained from satellite microwave radiometers, the Scanning Multichannel Microwave Radiometer, and the Special Sensor Microwave Imager are emphasized. These include sea-surface temperature and wind speed, integrated atmospheric water vapor, cloud liquid water, and rain rate.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Microwave Remote Sensing for Oceanographic and Marine Weather-Forecast Models; Aug 14, 1988; Dundee; United Kingdom
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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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
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The K-Gill - A twin propeller-vane anemometer for measurements of atmospheric turbulence (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A twin propeller-vane anemometer developed at the University of British Columbia was successfully used for unattended measurement of atmospheric turbulence over extended periods of time during moderate to high winds in the presence of sea spray. In this paper, a new design in twin propeller-vane anemometers is introduced. The instrument consists of two Gill anemometers mounted on a vane. The propeller shafts, one pointing up and the other pointing down, make an angle of 45 deg with the horizontal (hence, the name K-Gill). In addition to the desirable characteristics of the earlier design the K-Gill has symmetry, so that updraft and downdraft winds are measured with equal sensitivity. An algorithm for obtaining the vertical and downstream horizontal components of the wind velocity is described. Various sources of error and their magnitudes are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Atmospheric and Oceanic Technology (ISSN 0739-0572); 6; 509-515
    Format: text
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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
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