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  • GEOPHYSICS  (14)
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  • 1
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    The feasibility of sea surface temperature determination using satellite infrared data (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Sea surface temperature determination feasibility using satellite infrared data
    Keywords: GEOPHYSICS
    Type: NASA-CR-474
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Use of ERTS data for mapping Arctic sea ice (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: This investigation is to evaluate the application of ERTS data for detecting and mapping Arctic sea ice. The specific objectives are to determine the spectral bands most suitable for detecting ice, to measure the scale and types of ice features that can be detected, and to develop interpretive techniques for differentiating ice from clouds and for mapping ice concentrations. The ERTS data are being analyzed primarily for three Arctic areas, the eastern Beaufort Sea, Baffin Bay, and the Greenland Sea.
    Keywords: GEOPHYSICS
    Type: PAPER-M14 , NASA. Goddard Space Flight Center Symp. on Significant Results obtained from the ERTS-1 Vol. 1, Sect. A and B; p 1377-1384
    Format: application/pdf
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  • 3
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    Use of ERTS data for mapping snow cover in the western United States (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The purpose of this investigation is to evaluate the application of ERTS data for mapping snow cover, primarily in the mountainous areas of the western United States. The specific objectives are to determine the spectral interval most suitable for snow detection, to determine the accuracy with which snow lines can be mapped in comparison with the accuracies attainable from other types of measurements, and to develop techniques to differentiate reliably between snow and clouds and to understand the effects of terrain and forest cover on snow detection.
    Keywords: GEOPHYSICS
    Type: PAPER-W18 , NASA. Goddard Space Flight Center Symp. on Significant Results obtained from the ERTS-1, Vol. 1, Sect. A and B; p 855-862
    Format: application/pdf
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  • 4
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    Monitoring Arctic Sea ice using ERTS imagery (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Because of the effect of sea ice on the heat balance of the Arctic and because of the expanding economic interest in arctic oil and other minerals, extensive monitoring and further study of sea ice is required. The application of ERTS data for mapping ice is evaluated for several arctic areas, including the Bering Sea, the eastern Beaufort Sea, parts of the Canadian Archipelago, and the Greenland Sea. Interpretive techniques are discussed, and the scales and types of ice features that can be detected are described. For the Bering Sea, a sample of ERTS imagery is compared with visual ice reports and aerial photography from the NASA CV-990 aircraft.
    Keywords: GEOPHYSICS
    Type: PAPER-M10 , NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. B; p 1453-1465
    Format: text
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  • 5
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    Mapping snow extent in the Salt-Verde Watershed and the southern Sierra Nevada using ERTS imagery (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: In much of the western United States a large part of the utilized water comes from accumulated mountain snowpacks; thus, accurate measurements of snow distributions are required for input to streamflow prediction models. The application of ERTS imagery for mapping snow has been evaluated for two geographic areas, the Salt-Verde Watershed in central Arizona and the southern Sierra Nevada in California. Techniques have been developed to identify snow and to differentiate between snow and cloud. The snow extent for these two drainage areas has been mapped from the MSS-5 (0.6-0.7 micron) imagery and compared with aerial survey snow charts, aircraft photography, and ground-based snow measurements.
    Keywords: GEOPHYSICS
    Type: PAPER-W1 , NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. B; p 977-993
    Format: text
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  • 6
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    The application of ERTS imagery to mapping snow cover in the western United States (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. In much of the western United States a large part of the utilized water comes from accumulated mountain snowpacks; thus, accurate measurements of snow distributions are required for input to streamflow prediction models. The application of ERTS-1 imagery for mapping snow has been evaluated for two geographic areas, the Salt-Verde watershed in central Arizona and the southern Sierra Nevada in California. Techniques have been developed to identify snow and to differentiate between snow and cloud. The snow extent for these two drainage areas has been mapped from the MSS-5 (0.6 - 0.7 microns) imagery and compared with aerial survey snow charts, aircraft photography, and ground-based snow measurements. The results indicate that ERTS imagery has substantial practical applications for snow mapping. Snow extent can be mapped from ERTS-1 imagery in more detail than is depicted on aerial survey snow charts. Moreover, in Arizona and southern California cloud obscuration does not appear to be a serious deterrent to the use of satellite data for snow survey. The costs involved in deriving snow maps from ERTS-1 imagery appear to be very reasonable in comparison with existing data collection methods.
    Keywords: GEOPHYSICS
    Type: E74-10400 , NASA-CR-137223 , ERT-P-407-F
    Format: application/pdf
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  • 7
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    Use of satellite data for mapping snow cover in the western United States (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. The results of the analysis of ERTS imagery for the Arizona and California test sites indicate that the extent of the mountain snowpacks can be mapped from ERTS data in more detail than is depicted in aerial survey snow charts. In addition to comparative analysis with aerial snow charts, the ERTS data have also been compared with high altitude aircraft photography. The results of the comparative analysis indicate that although small details in the snow line that cannot be detected in the ERTS data can be mapped from the higher resolution aircraft data, the boundaries of the areas of significant snow cover can be mapped as accurately from ERTS imagery as from aircraft photography.
    Keywords: GEOPHYSICS
    Type: E73-10866 , NASA-CR-133355 , Symp. on Management and Utilization of Remote Sensing Data; Oct 29, 1973 - Nov 02, 1973; Sioux Falls, S. D.; United States
    Format: application/pdf
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  • 8
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    Use of ERTS data for mapping Arctic sea ice (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E73-10278 , NASA-CR-130561 , ERT-P-408-3
    Format: application/pdf
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  • 9
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    Use of Nimbus 2 APT to determine the rate of ice disintegration and dispersion in Hudson Bay (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Nimbus 2 APT photographs used to determine rate of ice disintegration and dispersion over Hudson Bay
    Keywords: GEOPHYSICS
    Type: NASA-CR-106478 , REPT-9G45-31 , TR-8
    Format: application/pdf
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  • 10
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    A study to develop improved spacecraft show survey methods using Skylab/EREP data: Demonstration of the utility of the S190 and S192 data (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. This interim report provides a demonstration of the utility of spacecraft acquired Skylab S190A and S190B photography and S192 imagery for mapping areal extent of snow cover in western United States test site areas. The data sample is from the SL-2 mission flown in June 1973. Results of the investigation indicate that areal snow cover extent can be mapped more accurately from the S190A and S190B photography than from any other spacecraft system, including ERTS. The results of a qualitative analysis of the S192 imagery indicate considerable potential for the utility of multispectral snow cover analysis; the potential for distinguishing snow from clouds automatically is particularly significant.
    Keywords: GEOPHYSICS
    Type: E74-10582 , NASA-CR-138687 , ERT-P-412-7
    Format: application/pdf
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