›› 2013, Vol. 33 ›› Issue (2): 13-18.doi: 10.3780/j.issn.1000-758X.2013.02.003

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Selection of Integration Center for Chang'e-2 Satellite Extended Mission

 CAO  Jian-Feng1,2,3, HU  Song-Jie1,2, HUANG  Yong1,3, LIU  Lei1,2, LIU  Yong1,2, TANG  Ge-Shi1,2, LI  Xie1,2   

  1. (1 Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing 100094)(2 Beijing Aerospace Control Center, Beijing 100094)(3 Shanghai Astronomical Observatory, Shanghai 200030 )
  • Received:2012-07-12 Revised:2012-08-30 Online:2013-04-25 Published:2013-04-25

Abstract: The selection of integration center is inevitably involved in the orbital spacecraft calculation, so it is for Chang'e 2  (CE-2)  mission. During its extended mission, CE-2 satellite was placed in the Sun-Earth L2 libration orbit near the weak gravitational area. The selection of the integration center was discussed with theoretical analysis. According to the perturbed twobody problem, it is appropriate to choose the Sun as the integration center. While the force model was calculated by using the JPL DE ephemeris without considering the perturbation of small planets, the Earth would appear to be a better choice.

Key words: Orbit integration, Central body, Perturbed two-body problem, Extended mission, Chang'e-2 satellite