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  • 1
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    Atmospheric attenuation relative to earth-viewing orbital sensors (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-02
    Description: Earth viewing space missions offer exciting new possibilities in several earth resources disciplines - geography, hydrology, agriculture, geology, and oceanography, to name a few. A most useful tool in planning experiments and applying space technology to earth observation is a statistical description of atmospheric parameters. Four dimensional atmospheric models and a world wide cloud model are used to produce atmospheric attenuation models to predict degradation effects for all classes of sensors for application to earth sensing experiments from spaceborne platforms. To insure maximum utility and application of these products, the development of an interaction model of microwave energy and atmospheric variables provides a complete description of the effects of atmospheric moisture upon microwaves.
    Keywords: GEOPHYSICS
    Type: Terrest. Environ. (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Develop., 1973 Rev.; 21 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Status report: Data management program algorithm evaluation activity at Marshall Space Flight Center (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An algorithm evaluation activity was initiated to study the problems associated with image processing by assessing the independent and interdependent effects of registration, compression, and classification techniques on LANDSAT data for several discipline applications. The objective of the activity was to make recommendations on selected applicable image processing algorithms in terms of accuracy, cost, and timeliness or to propose alternative ways of processing the data. As a means of accomplishing this objective, an Image Coding Panel was established. The conduct of the algorithm evaluation is described.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-TM-78148
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Vector statistics of LANDSAT imagery (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A digitized multispectral image, such as LANDSAT data, is composed of numerous four dimensional vectors, which quantitatively describe the ground scene from which the data are acquired. The statistics of unique vectors that occur in LANDSAT imagery are studied to determine if that information can provide some guidance on reducing image processing costs. A second purpose of this report is to investigate how the vector statistics are changed by various types of image processing techniques and determine if that information can be useful in choosing one processing approach over another.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-78149
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    A brief description of an Earth Resources Technology Satellite (ERTS) computer data analysis and management program (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A data analysis and management procedure currently being used at Marshall Space Flight Center to analyze ERTS digital data is described. The objective is to acquaint potential users with the various computer programs that are available for analysis of multispectral digital imagery and to show how these programs are used in the overall data management plan. The report contains a brief description of each computer routine, and references are provided for obtaining more detailed information.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-64793
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Some observations about LANDSAT digital analysis (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Several hypotheses concerning LANDSAT data are analyzed. These hypotheses are: (1) LANDSAT does not discriminate vegetation types, but mostly sees chlorophyl and canopy cover. (2) A majority of the features in the ground scene possess linearly proportional amounts of color from each spectral band. (3) The data are continuous and as a result there is no true separability of ground scene features in the data, but some features possess an excess of color in a particular band pair. (4) There are relatively few features present in the spectral data, and these do not correspond to the conventional definitions that are used. (5) Aside from seasonal effects, in a distributional sense all LANDSAT data are essentially the same. The only difference is the way the data are spatially arranged in the image.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-78184
    Format: application/pdf
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  • 6
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    Classification software technique assessment (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A catalog of software options is presented for the use of local user communities to obtain software for analyzing remotely sensed multispectral imagery. The resources required to utilize a particular software program are described. Descriptions of how a particular program analyzes data and the performance of that program for an application and data set provided by the user are shown. An effort is made to establish a statistical performance base for various software programs with regard to different data sets and analysis applications, to determine the status of the state-of-the-art.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA-TN-D-8240 , M-172
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Evaluation criteria for software classification inventories, accuracies, and maps (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Statistical criteria are presented for modifying the contingency table used to evaluate tabular classification results obtained from remote sensing and ground truth maps. This classification technique contains information on the spatial complexity of the test site, on the relative location of classification errors, on agreement of the classification maps with ground truth maps, and reduces back to the original information normally found in a contingency table.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-X-73347
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Nearest neighbor, bilinear interpolation and bicubic interpolation geographic correction effects on LANDSAT imagery (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Geographical correction effects on LANDSAT image data are identified, using the nearest neighbor, bilinear interpolation and bicubic interpolation techniques. Potential impacts of registration on image compression and classification are explored.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-X-73348
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Computer analysis of LANDSAT data (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Report summarizing possible ways of improving LANDSAT data provided by computers is presented.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-25105 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 214
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Multidimensional histograms (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Program computes four dimensional histogram of Landsat multispectral image data. System enhances image handling and significantly reduces reprocessing costs.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23855 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 526
    Format: text
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    NASA TECHNICAL REPORTS
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