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  • EARTH RESOURCES AND REMOTE SENSING  (6)
  • 2005-2009
  • 1980-1984  (6)
  • 1935-1939
  • 1
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    Geobotanical discrimination of ultramafic parent materials An evaluation of remote sensing techniques (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Color and color infrared aerial photography and imagery acquired from a Daedalus DEI-1260 multispectral airborne scanner were employed in an investigation to discriminate ultramafic rock types in a test site in southwest Oregon. An analysis of the relationships between vegetation characteristics and parent materials was performed using a vegetation classification and map developed for the project, lithologic information derived from published geologic maps of the region, and terrain information gathered in the field. Several analytical methods, including visual image analysis, band ratioing, principal components analysis, and contrast enhancement and subsequent color composite generation were used in the investigation. There was a close correspondence between vegetation types and major rock types. These were readily discriminated by the remote sensing techniques. It was found that ultramafic rock types were separable from non-ultramafic rock types and serpentine was distinguishable from non-serpentinized peridotite. Further investigations involving spectroradiometric and digital classification techniques are being performed to further identify rock types and to discriminate chromium and nickel-bearing rock types.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
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    NASA TECHNICAL REPORTS
  • 2
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    Detection and damage assessment of citrus tree losses with aerial color infrared photography /ACIR/ (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Detection and disease damage assessment of citrus tree losses in a Florida citrus grove were made by establishing a registration (grove site location) coordinate system, developing a damage assessment system, and testing sequential aerial color infrared (ACIR) photography at the scale of 1 in. = 333 ft (2.5 cm = 100 m) during the winter, spring, and summer seasons of 1978 and spring of 1979. Spring photography was the easiest to photo interpret, showed the greatest differences between healthy and diseased trees, and had the least shadow and background interference for photo interpretation. Trees showing slight disease damage were detected in ACIR before they were found in ground surveys.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Color aerial photography in the plant sciences and related fields; Apr 21, 1981 - Apr 23, 1981; Luray, VA
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    NASA TECHNICAL REPORTS
  • 3
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    Use of Thematic Mapper for water quality assessment (1984)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The evaluation of simulated TM data obtained on an ER-2 aircraft at twenty-five predesignated sample sites for mapping water quality factors such as conductivity, pH, suspended solids, turbidity, temperature, and depth, is discussed. Using a multiple regression for the seven TM bands, an equation is developed for the suspended solids. TM bands 1, 2, 3, 4, and 6 are used with logarithm conductivity in a multiple regression. The assessment of regression equations for a high coefficient of determination (R-squared) and statistical significance is considered. Confidence intervals about the mean regression point are calculated in order to assess the robustness of the regressions used for mapping conductivity, turbidity, and suspended solids, and by regressing random subsamples of sites and comparing the resultant range of R-squared, cross validation is conducted.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Machine processing of remotely sensed data: Thematic Mapper data and geographic information systems; Jun 12, 1984 - Jun 14, 1984; West Lafayette, IN
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    NASA TECHNICAL REPORTS
  • 4
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    Remote sensing of the marginal ice zone during Marginal Ice Zone Experiment (MIZEX) 83 (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The remote sensing techniques utilized in the Marginal Ice Zone Experiment (MIZEX) to study the physical characteristics and geophysical processes of the Fram Strait Region of the Greenland Sea are described. The studies, which utilized satellites, aircraft, helicopters, and ship and ground-based remote sensors, focused on the use of microwave remote sensors. Results indicate that remote sensors can provide marginal ice zone characteristics which include ice edge and ice boundary locations, ice types and concentration, ice deformation, ice kinematics, gravity waves and swell (in the water and the ice), location of internal wave fields, location of eddies and current boundaries, surface currents and sea surface winds.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: ESA IGARSS 84. Remote Sensing: From Res. towards Operational Use, Vol. 1; p 339-346
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  • 5
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    Effects of altitude, focal length, and filter combinations on color infrared photography of citrus groves (1981)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Annual Meeting; Feb 22, 1981 - Feb 27, 1981; Washington, DC
    Format: text
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  • 6
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    Aerial color infrared photography applications to citriculture (1980)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Results of a one-year experimental study on the use of aerial color infrared photography in citrus grove management are presented. It is found that the spring season, when trees are in flush (have young leaves), is the best season to photograph visible differences between healthy and diseased trees. It is also shown that the best photography can be obtained with a 12-in. focal length lens. The photographic scale that allowed good photo interpretation with simple inexpensive equipment was 1 in. = 330 ft. The use of a window-overlay transparency method allowed rapid photo interpretation and data recording in computer-compatible forms. Aerial color infrared photography carried out during the spring season revealed a more accurate status of tree condition than visual inspection.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: A new era in technology; Apr 30, 1980 - May 02, 1980; Cocoa Beach, FL
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    NASA TECHNICAL REPORTS
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