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  • EARTH RESOURCES AND REMOTE SENSING  (240)
  • Animals
  • 2000-2004
  • 1980-1984
  • 1975-1979  (240)
  • 1975  (240)
  • 1
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    Geologic and mineral and water resources investigations in western Colorado, using Skylab EREP data (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. Skylab photographs are superior to ERTS images for photogeologic interpretation, primarily because of improved resolution. Lithologic contacts can be detected consistently better on Skylab S190A photos than on ERTS images. Color photos are best; red and green band photos are somewhat better than color-infrared photos; infrared band photos are worst. All major geologic structures can be recognized on Skylab imagery. Large folds, even those with very gentle flexures, can be mapped accurately and with confidence. Bedding attitudes of only a few degrees are recognized; vertical exaggeration factor is about 2.5X. Mineral deposits in central Colorado may be indicated on Skylab photos by lineaments and color anomalies, but positive identification of these features is not possible. S190A stereo color photography is adequate for defining drainage divides that in turn define the boundaries and distribution of ground water recharge and discharge areas within a basin.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E76-10383 , NASA-CR-144513 , REPT-75-7
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Agricultural inventory capabilities of machine processed LANDSAT digital data (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Agricultural crop identification and acreage determination analysis of LANDSAT digital data was performed for two study areas. A multispectral image processing and analysis system was utilized to perform the manmachine interactive analysis. The developed techniques yielded crop acreage estimate results with accuracy greater than 90% and as high as 99%. These results are encouraging evidence of agricultural inventory capabilities of machine processed LANDSAT digital data.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: A-16 , NASA. Lyndon B. Johnson Space Center. NASA Earth Resources Survey Symp. Vol. 1-A: Agr., Environment; p 221-232
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Remote sensing of San Pablo Bay and Santa Barbara channel islands (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10412 , NASA-CR-143405
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    California Coast Nearshore Processes Study Using ERTS-B Data (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E76-10113 , NASA-CR-146046
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    A wetlands inventory of the state of Nebraska using ERTS-1 imagery (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The use of ERTS-1 imagery permitted a rapid, economic, and accurate inventory of wetlands in Nebraska that are ten acres or larger in size. Four categories of wetlands - Open Water, Subirrigated Meadows, Marshes, and Seasonally Flooded Basins - were delineated by using two seasons of imagery and an electronic image-enhancing system. Positive print enlargements of bands 5 and 7 at a scale of 1:250,000 (acquired in the spring) as well as band 7 (acquired in late summer) were used to delineate all categories. Electronic enhancement of band 6 (acquired in the fall) was used as an aid to further differentiate marshes. Accuracy estimates based on color infrared aerial photography as ground truth indicated, as an overall average, 85 percent correct identification.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Remote sensing of earth resources. Volume 4; Mar 24, 1975 - Mar 26, 1975; Tullahoma, TN
    Format: text
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  • 6
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    Skylab analysis of San Francisco Bay (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The distribution and volume of sediment present in suspension during the Skylab 4 overpass for San Pablo Bay and the Carquinez Strait is studied along with the movement and eventual distribution of both natural and dredged sediment in San Francisco Bay. The most useful Skylab sensor film is found to be the S-190B color photography. Changes in temperature, dissolved oxygen, pH, salinity, and pollutants information simultaneously collected are correlated with the spectral differences observed in the various Skylab data. The techniques outlined should be applicable for coastal and estuarine process studies in other areas. A suspensate concentration of about 2 mg/liter is quite sufficient to tag a surface current system, and the surface structure of currents with over 250 mg/liter can be imaged by using progressively longer wavelength filters.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: International Symposium on Remote Sensing of Environment; Oct 06, 1975 - Oct 10, 1975; Ann Arbor, MI
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Spaceborne Earth Applications Ranging system (SPEAR) (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A technique is discussed for the accurate (i.e. to within fractions of cm/yr) detection of earth surface motions utilizing the latest space technology. It is shown that over a six day period and assuming a 50% cloud cover (as experienced over the last few years of laser operation) utilizing spaceborne precision ranging systems, intersite distances on the order of 5 to 15 km can be determined in the vertical and horizontal components with errors in the 0.5 to 1.5 cm range. These errors are almost independent of ground survey errors up to 0.25 meters and orbit errors up to 200 meters. A spaceborne laser ranging system is assumed to range simultaneously to two or more ground emplaced retroreflectors. The fundamental advantage derived from simultaneous ranging is the elimination to first order of errors due to the system. This means elimination of bias errors in the ranging system, errors due to propagation effects, and errors associated with the spacecraft's motion in its orbit.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-X-71035 , X-920-75-299 , COSPAR 19th Plenary Meeting; Jun 08, 1976 - Jun 19, 1976; Philadelphia, PA; United States
    Format: application/pdf
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  • 8
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    California coastal processes study: Skylab (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. In San Pablo Bay, the patterns of dredged sediment discharges were plotted over a three month period. It was found that lithogenous particles, kept in suspension by the fresh water from the Sacramento-San Joaquin, were transported downstream to the estuarine area at varying rates depending on the river discharge level. Skylab collected California coastal imagery at limited times and not at constant intervals. Resolution, however, helped compensate for lack of coverage. Increased spatial and spectral resolution provided details not possible utilizing Landsat imagery. The S-192 data was reformatted; band by band image density stretching was utilized to enhance sediment discharge patterns entrainment, boundaries, and eddys. The 26 January 1974 Skylab 4 imagery of San Francisco Bay was taken during an exceptionally high fresh water and suspended sediment discharge period. A three pronged surface sediment pattern was visible where the Sacramento-San Joaquin Rivers entered San Pablo Bay through Carquinez Strait.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E76-10030 , NASA-CR-144489
    Format: application/pdf
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  • 9
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    Evaluation of LANDSAT-2 data for selected hydrologic applications (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10407 , NASA-CR-143400
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Applied Remote Sensing Program (ARSP) to state and local government (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Environmental surveys of arid land areas (Arizona) in the United States are presented. Maps of soils, vegetation, drainage patterns, and land use are shown. The distribution of uranium deposits, oil and gas pools, is also shown. Legislation pertaining to the preservation of natural resources is discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-143456 , OALS-BULL-10
    Format: application/pdf
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