The Characteristics and Related Problems of the Orbits Around the Earth-Moon Libration Points |
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| Authors: | Liu Lin Tang Jing-shi Hou Xi-yun |
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| Institution: | 1. School of Astronomy and Space Science, Nanjing University, Nanjing 210046;2. Institute of Space Environment and Astrodynamics, Nanjing University, Nanjing 210093 |
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| Abstract: | Due to the specific dynamics, the probes located at the halo orbits or Lissajous orbits around the Earth-Moon collinear libration point L1 or L2 are always studied in the synodic system to understand their trajectories. In fact, they are also orbiting the Earth in a distant Keplerian ellipse. Because of their intrinsic orbital instability, in the orbit prediction the initial errors propagate more prominently than those of the normal orbiting satellites, this requires special attention in the orbit design, maneuver, and control. Despite of all this, they are similar to the normal orbiting satellites in orbit determination and hardly require other special attentions. In this paper, the quantitative results of error propagation under the unstable dynamics, together with the theoretical analysis are presented. The results of precise orbit determination and short-arc orbit predictions are also shown, and compared with the results from the Beijing Aerospace Control Center. |
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| Keywords: | Corresponding author Celestial mechanics Earth Moon Orbit prediction |
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