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  • 2010-2014  (2)
  • 1975-1979  (10)
  • 1
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    Atlas of soil reflectance properties (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A compendium of soil spectral reflectance curves together with soil test results and site information is presented in an abbreviated manner listing those soil properties most important in influencing soil reflectance. Results are presented for 251 soils from 39 states and Brazil. A narrative key describes relationships between soil parameters and reflectance curves. All soils are classified according to the U.S. soil taxonomy and soil series name for ease of identification.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-160446 , LARS-TR-111579
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Evaluation of Skylab data for land use mapping (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Skylab multispectral scanner data, digitized Skylab color IR photography, digitized Skylab black and white multiband photography, and Earth Resources Technology Satellite (ERTS) multispectral scanner data collected within a twenty-four hour time period over an area in south-central Indiana near Bloomington on June 9 and 10, 1973, were compared in a machine-aided land use analysis of the area. The overall classification performance results, obtained with nine land use classes were 87% correct classification using the 'best' 4 channels of the Skylab multispectral scanner, 80% for the channels on the Skylab multispectra scanner, which are spectrally comparable to the ERTS multispectral scanner, 88% for the ERTS multispectral scanner, 83% for the digitized color IR photography, and 76% for the digitized black and white multiband photography. The results indicate that the Skylab multispectral scanner may yield even higher classification accuracies when a noise filtered multispectral scanner data set becomes available in the near future.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Journal of the Astronautical Sciences; 23; Apr
    Format: text
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  • 3
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    A multilevel multispectral data set analysis in the visible and infrared wavelength regions (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Skylab multispectral scanner data, digitized Skylab color infrared (IR) photography, digitized Skylab black and white multiband photography, and Earth Resources Technology Satellite (ERTS) multispectral scanner data collected within a 24-hr time period over an area in south-central Indiana near Bloomington on June 9 and 10, 1973, were compared in a machine-aided land use analysis of the area. The overall classification performance results, obtained with nine land use classes, were 87% correct classification using the 'best' 4 channels of the Skylab multispectral scanner, 80% for the channels on the Skylab multispectral scanner which are spectrally comparable to the ERTS multispectral scanner, 88% for the ERTS multispectral scanner, 83% for the digitized color IR photography, and 76% for the digitized black and white multiband photography. The results indicate that the Skylab multispectral scanner may yield even higher classification accuracies when a noise-filtered multispectral scanner data set becomes available in the near future.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IEEE; vol. 63
    Format: text
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  • 4
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    Machine aided multispectral analysis utilizing Skylab thermal data for land use mapping (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Eight-channel Skylab multispectral-scanner data obtained in January 1974 were used in a level two land-use analysis of Allen County, Indiana. The data set which includes one visible channel, four near infrared channels, two middle infrared channels, and one far infrared channel was from the X-5 detector array of the S-192 experiment in the Earth Resources Experiment Package on board the Skylab space station. The results indicate that a good quality far infrared (thermal) channel is very valuable for land use mapping during the winter months.-
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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  • 5
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    An empirical study of scanner system parameters (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Parametric values (instantaneous field of view, number and location of spectral bands, signal-to-noise ratio, etc.) of a multispectral scanner (thematic mapper) are assigned empirically. An empirical simulation approach was used with candidate parameter values selected by heuristic means. Results obtained using a conventional maximum likelihood pixel classifier suggest that although the classification accuracy declines slightly as the instantaneous field of view (IFOV) is decreased this is more than made up by an improved mensuration accuracy. Use of a classifier involving both spatial and spectral features helps resist degradation as the signal-to-noise ratio is decreased. The importance of having at least one spectral band in each of the major available portions of the optical spectrum is demonstrated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE Transactions on Geoscience Electronics; GE-15; July 197
    Format: text
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  • 6
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    Agricultural scene understanding, volume 1 (1978)
    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: E79-10161 , NASA-CR-160112 , LARS-112578-VOL-1
    Format: application/pdf
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  • 7
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    Large Area Crop Inventory Experiment (LACIE). Crop spectra from LACIE field measurements (1978)
    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: E79-10136 , NASA-CR-158145 , LACIE-00469 , JSC-13734 , LARS-011578
    Format: application/pdf
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  • 8
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    Calibration procedures for measurement of reflectance factor in remote sensing field research (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: A means by which measurements of the optical properties of crops and soils can be knowledgeably compared from site to site and instrument to instrument is presented in detail. The definition of bidirectional reflectance factor is reviewed and discussed. Procedures for field implementation are illustrated and discussed. Spectral and goniometric properties of laboratory and field reference surfaces and typical environmental subjects serve as a basis for analysis of uncertainties introduced by differing illumination conditions. Results of a comparison of the performance of three spectrometer systems are presented and discussed. It is concluded that intelligent use of the bidirectional reflectance factor technique is an accurate and practical means to obtain the spectral, optical properties of crops and soils needed for advancements in agricultural remote sensing.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Measurements of optical radiations; August 29, 30, 1979; San Diego, CA
    Format: text
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  • 9
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    Is there Spectral Variation in the Polarized Reflectance of Leaves? (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The light scattered by plant canopies depends in part on the light scattering/absorbing properties of the leaves and is key to understanding the remote sensing process in the optical domain. Here we specifically looked for evidence of fine spectral detail in the polarized portion of the light reflected from the individual leaves of five species of plants measured at Brewsters angle over the wavelength range 450 to 2300nm. Our results show no strong, unambiguous evidence of narrow band spectral variation of the polarized portion of the reflectance factor.
    Keywords: Exobiology; Earth Resources and Remote Sensing
    Type: ARC-E-DAA-TN14872 , SPIE DSS (Defence and Security Symposium) 2014; May 05, 2014 - May 09, 2014; Baltimore, MD; United States
    Format: application/pdf
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  • 10
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    Is There Spectral Variation in the Polarized Reflectance of Leaves? (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The light scattered by plant canopies depends in part on the light scattering/absorbing properties of the leaves and is key to understanding the remote sensing process in the optical domain. Here we specifically looked for evidence of fine spectral detail in the polarized portion of the light reflected from the individual leaves of five species of plants measured at Brewsters angle over the wavelength range 450 to 2300nm. Our results show no strong, unambiguous evidence of narrow band spectral variation of the polarized portion of the reflectance factor.
    Keywords: Earth Resources and Remote Sensing
    Type: Poster 9099-41 , ARC-E-DAA-TN14873 , SPIE DSS (Defence and Security Symposium) 2014; May 05, 2014; Baltimore, MD; United States
    Format: application/pdf
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