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  • GEOPHYSICS  (2)
  • 1970-1974  (2)
  • 1925-1929
  • 1974  (1)
  • 1972  (1)
  • 1
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    Determination of the geoid from satellite altimeter data (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The characteristics of the geoid surface are quantitatively described. A procedure for calculating the satellite altitude is developed. Error sources are described quantitatively, mathematically modeled, and evaluated in computer simulation. Procedures for maximum likelihood processing of altimeter data for recovery of orbit and geopotential information are presented for several geopotential models.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-66016 , X-550-72-268
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Numerical evaluation of electromagnetic fields due to dipole antennas in the presence of stratified media (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Two numerical methods are used to evaluate the integrals that express the em fields due to dipole antennas radiating in the presence of a stratified medium. The first method is a direct integration by means of Simpson's rule. The second method is indirect and approximates the kernel of the integral by means of the fast Fourier transform. In contrast to previous analytical methods that applied only to two-layer cases the numerical methods can be used for any arbitrary number of layers with general properties.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 79; May 10
    Format: text
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    NASA TECHNICAL REPORTS
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