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  • 1
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    Development of a variational SEASAT data analysis technique (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Oceans are data-sparse areas in terms of conventional weather observations. The surface pressure field obtained solely by analyzing the conventional weather data is not expected to possess high accuracy. On the other hand, in entering asynoptic data such as satellite-derived temperature soundings into an atmospheric prediction system, an improved surface analysis is crucial for obtaining more accurate weather predictions because the mass distribution of the entire atmosphere will be better represented in the system as a result of the more accurate surface pressure field. In order to obtain improved surface pressure analyses over the oceans, a variational adjustment technique was developed to help blend the densely distributed surface wind data derived from the SEASAT-A radar observations into the sparsely distributed conventional pressure data. A simple marine boundary layer scheme employed in the adjustment technique was discussed. In addition, a few aspects of the current technique were determined by numerical experiments.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-177175 , NAS 1.26:177175
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Development of the variational SEASAT data analysis technique (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Surface winds are closely associated with the surface pressure gradient. The variational SEASAT data analysis technique was designed to improve the sea level pressure analysis in the data sparse areas. The SEASAT-derived surface wind data were compared with observations from the Joint Air Sea Interaction Experiment (JASIN) and it was found that the satellite-derived sea surface wind has an accuracy of up to + or - 2 m/s in speed and + or - 20 deg in direction. These numbers are considered characteristic of the retrieved SEASAT wind field. By combining the densely spaced SEASAT-derived wind data with the sparsely distributed sea-level pressure observation via a variational adjustment technique subject to some appropriate physical constraint(s), an improvement in the sea-level pressure analysis is expected. It is demonstrated that a simple marine boundary layer scheme in conjunction with a variational adjustment technique can be developed to help improve the sea-level pressure analysis by the SEASAT-derived wind of a limited-area domain in the ocean.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-176471 , NAS 1.26:176471
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Severe storm environments: A Skylab EREP report (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results from the severe storm experiment over Texas and Oklahoma are presented. Correlation of data, soil moisture, water temperature, and cloud characteristics were considered. The sensors used in this study were multispectral band cameras, multispectral band scanners, infrared spectrometers, radiometers, and scatterometers.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E79-10027 , NASA-TM-58184
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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