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Bounded Circumlunar Spacecraft Formations

Bounded Circumlunar Spacecraft Formations

Monday 01/04/2019
  • Oren Fischman
  • Work towards MSc degree under the supervision of Prof. Pini Gurfil
  • Classroom 165, ground floor, Library, Aerospace Eng.
  • Department of Aerospace Engineering
  • Technion – Israel Institute of Technology
  • The talk will be given in English

Long-term satellite formation keeping must account for the effects of orbital perturbations. While long-term formation keeping around the Earth has been thoroughly studied, lunar formations are yet to be further explored. In comparison to the Earth, the Moon introduces a more complex gravitational field, and requires taking into account additional gravitational perturbations.

In this work, the rates of the differential orbital elements of two lunar satellites in formation are expanded up to second order. These rates are then simplified, assuming the chief satellite is on a frozen lunar reference orbit. Additional assumptions are made to simplify the variational equations further, while retaining second-order terms. Numerical simulations are performed to illustrate the feasibility of using simplified rates of the differential orbital elements under various perturbation mitigation techniques, for a nominal orbit which deviates from the assumed frozen reference orbit. These simulations are carried out for a variety of scenarios, including frozen and near-frozen chief orbits, based on an actual lunar formation flying mission. The analysis validates the feasibility of using perturbation mitigation techniques for future lunar formation flying missions.

Light refreshments will be served before the lecture
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