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  • 1
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    A look at the commonly used LANDSAT vegetation indices (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The origins, development, and logic of the indices are discussed. The relationships of the indices to ground-based measurements of vegetation are highlighted. An effort was made to preserve the order in which the various indices appeared in the literature in order to historically trace their underlying concepts.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10123 , NASA-CR-167474 , NAS 1.26:167474 , EW-L1-04134 , JSC-17413 , LEMSCO-16844
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Area estimation of environmental phenomena from NOAA-n satellite data (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A technique for documenting changes in size of NOAA-n pixels in order to calibrate the data for use in performing area calculations is described. Based on Earth-satellite geometry, a function for calculating the effective pixel size, measured in terms of ground area, on any given pixel was derived. The equation is an application of the law of sines plus an arclength formula. Effective pixel dimensions for NOAA 6 and 7 satellites for all pixels between nadir and the extreme view angles are presented. The NOAA 6 data were used to estimate the areas of several lakes, with an accuracy within 5%. Sources of error are discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10275 , NASA-CR-167569 , EW-L1-04190 , JSC-17437 , NAS 1.26:167569 , LEMSCO-17312
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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