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- W2056688382 abstract "A double resonance model is applied to study the long term evolution of a Molniya orbit, which is highly elliptical (e⩾0.7), critically inclined (i≈63.4°), and in the state of the 2:1 mean motion resonance with the Earth rotation. The dynamics of a Molniya orbit can be divided into three kinds: short (12 h), intermediate (several years) and long (several centuries) period motions, with the latter two studied in this paper. The J2 and Jl2 (l=2,3,…,8) harmonics are modelled, based on a careful selection. The analytic solution for the intermediate period motion is obtained, a first integral, I¯3, for the long period motion is derived analytically, and the phase structures are obtained by the level curves of I¯3. Three types of the phase structures, depending on the equilibria and stabilities, are observed when the Hamiltonian constant varies. Compared with the near circular 12-h satellite orbits and with the critically inclined orbits without mean motion resonance with the Earth rotation, the features of the Molniya orbits are discussed in detail. It is pointed out that (1) unlike the case of near circular orbits, the J32 term does not dominate the 2:1 mean motion resonance problem (intermediate period motion), and that (2) instead of the J22 terms, the resonant tesseral harmonics dominate the critical inclination problem (long period motion)." @default.
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- W2056688382 date "2014-07-01" @default.
- W2056688382 modified "2023-09-28" @default.
- W2056688382 title "Long term evolution of Molniya orbit under the effect of Earth’s non-spherical gravitational perturbation" @default.
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- W2056688382 doi "https://doi.org/10.1016/j.asr.2014.04.003" @default.
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