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  • perturbation theory  (2)
  • ASTRONOMY  (1)
  • EARTH RESOURCES AND REMOTE SENSING  (1)
  • ELECTRONIC EQUIPMENT  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): symplectic form ; symplectic mapping ; Hamiltonian formalism ; perturbation theory ; N-body problem
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008374927645
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Hamiltonian dynamics ; symplectic forms ; asteroid motion ; perturbation theory ; secular resonances
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692067
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
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    Unbekannt
    ESTIMATION OF LONGITUDINAL VARIATIONS IN THE EARTH'S GRAVITATIONAL FIELD FROM MINITRACK OBSERVATIONS (1961)
    In:  CASI
    Details
    Publikationsdatum: 2006-10-26
    Beschreibung: Longitudinal variations in the earths gravitational field from minitrack observations
    Schlagwort(e): ELECTRONIC EQUIPMENT
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 4
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    A gravitational kinetic theory for planetesimals (1980)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: An analytical theory is developed for the velocity evolution of nonaccreting planetesimal populations, based on the Boltzmann and Fokker-Planck equations. Adapting Shkarofsky's calculation of plasma viscosities, the rate of increase in random velocities due to gravitational encounters between planetesimals of equal mass is found to be one-third to one-half Safronov's result. Comparison with Wetherill's numerical experiments suggests that the Fokker-Planck equation underestimates the effectiveness of encounters and that Safronov's value is approximately correct. For populations of nonuniform sizes, the Fokker-Planck equation indicates an efficient redistribution of energy from the largest bodies to the smaller ones. By conserving angular momentum, the rate of radial spreading of orbits is also derived.
    Schlagwort(e): ASTRONOMY
    Materialart: Icarus; 44; Oct. 198
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 5
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    Geodynamic problems (1978)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The understanding of the solid earth and suggestions of what measurements should be undertaken based on estimates of instrumental feasibilities were reviewed. The observations include: (1) earth evolution and mantle convection; (2) lithosphere-asthenosphere-surface load interaction; (3) glacier-ocean-solid earth interaction; (4) solid earth interactions with the sun, moon, core, oceans, and atmosphere; (5) zones of strain accumulation; and (6) earthquakes.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: Ohio State Univ. Appl. of Geodesy to Geodyn., an Intern. Symp.; p 345-351
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
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