Geometric derivation of the Delaunay variables and geometric phases

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We derive the classical Delaunay variables by finding a suitable symmetry action of the three torus T-3 on the phase space of the Kepler problem, computing its associated momentum map and using the geometry associated with this structure. A central feature in this derivation is the identification of the mean anomaly as the angle variable for a symplectic S-1 action on the union of the non-degenerate elliptic Kepler orbits. This approach is geometrically more natural than traditional ones such as directly solving Hamilton-Jacobi equations, or employing the Lagrange bracket. As an application of the new derivation, we give a singularity free treatment of the averaged J(2)-dynamics (the effect of the bulge of the Earth) in the Cartesian coordinates by making use of the fact that the averaged J(2)-Hamiltonian is a collective Hamiltonian of the T-3 momentum map. We also use this geometric structure to identify the drifts in satellite orbits due to the J(2) effect as geometric phases.
Publisher
KLUWER ACADEMIC PUBL
Issue Date
2003-06
Language
English
Article Type
Article
Keywords

ARTIFICIAL-SATELLITE THEORY; REDUCTION; ORBITS

Citation

CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, v.86, no.2, pp.185 - 208

ISSN
0923-2958
DOI
10.1023/A:1024174702036
URI
http://hdl.handle.net/10203/220734
Appears in Collection
EE-Journal Papers(저널논문)
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