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  • GEOPHYSICS  (4)
  • perturbation theory  (2)
  • 1995-1999  (2)
  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Mass-Weighted Symplectic Forms for the N-Body Problem (1998)
    Springer
    Celestial mechanics and dynamical astronomy 72 (1998), S. 187-199 
    Details
    ISSN: 1572-9478
    Keywords: symplectic form ; symplectic mapping ; Hamiltonian formalism ; perturbation theory ; N-body problem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mass-weighted symplectic forms provide a unified framework for the treatment of both finite and vanishingly small masses in the N-body problem. These forms are introduced, compared to previous approaches, and their properties are discussed. Applications to symplectic mappings, the definition of action-angle variables for the Kepler problem, and Hamiltonian perturbation theory are outlined
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008374927645
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Singularly weighted symplectic forms and applications to asteroid motion (1995)
    Springer
    Celestial mechanics and dynamical astronomy 62 (1995), S. 23-41 
    Details
    ISSN: 1572-9478
    Keywords: Hamiltonian dynamics ; symplectic forms ; asteroid motion ; perturbation theory ; secular resonances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New techniques to study Hamiltonian systems with Hamiltonian forcing are proposed. They are based on singularly weighted symplectic forms and transformations which preserve these forms. Applications pertaining to asteroid motion are outlined. These involve the presence of both Jupiter and Saturn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692067
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    Paper (German National Licenses)
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  • 3
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    Potentialities of lunar laser ranging for measuring tectonic motions. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The lunar laser-ranging system at McDonald Observatory, Texas, is currently attaining accuracies of plus or minus 15 cm, and plus or minus 3 cm appears feasible. Numerical error analyses containing 97 parameters (35 of them for error sources) indicate that the plus or minus 3 cm system would measure station motions to plus or minus 1 cm/year accuracy within a year for east-west motions and within about 3 years for north-south. Furthermore, the correlations of station motions with other parameters are low, so that it is unlikely that the estimate is too optimistic because of modeling inadequacies of the error analysis.
    Keywords: GEOPHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Error analysis for station position from tracking of the Lageos satellite (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The earth physics satellite systems error analysis program was applied to the problem of predicting the relative accuracy of station position determinations under varying orbital and observing geometries. The reference case consists of nine ground stations extending over 1500 km which lasers ranged to a LAGEOS satellite, with simultaneous Doppler tracking from a geosynchronous satellite for 16 days. Eleven variations from the reference case were tested. The results showed little sensitivity to whether the LAGEOS altitude is 3700 or 5690 km. More significant were the high inclination, and that LAGEOS was tracked by a geosynchronous satellite.
    Keywords: GEOPHYSICS
    Type: NASA-CR-140118
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Tidal theory and orbital perturbations (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Linking ocean tides to satellite orbits
    Keywords: GEOPHYSICS
    Type: NASA-CR-121641
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Application of space and astronomic techniques to solid earth and ocean physics (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Space and astronomic methods applied to solid earth and ocean physics
    Keywords: GEOPHYSICS
    Type: ADVANCES IN DYNAMIC GRAVIMETRY, SYMPOSIUM ON DYNAMIC GRAVIMETRY; Mar 16, 1970 - Mar 17, 1970; FORT WORTH, TX
    Format: text
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    NASA TECHNICAL REPORTS
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