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Abstract
This paper proposes the use of doublysymmetric, eightshaped orbits in the circular restricted threebody problem for continuous coverage of the highlatitude regions of the Earth. These orbits, for a range of amplitudes, spend a large fraction of their period above either pole of the Earth. It is shown that they complement Sunsynchronous polar and highly eccentric Molniya orbits, and present a possible alternative to low thrust polesitter orbits. Both natural and solarsail displaced orbits are considered. Continuation methods are described and used to generate families of these orbits. Starting from ballistic orbits, other families are created either by increasing the sail lightness number, varying the period or changing the sail attitude. Some representative orbits are then chosen to demonstrate the visibility of highlatitude regions throughout the year. A stability analysis is also performed, revealing that the orbits are unstable: it is found that for particular orbits, a solar sail can reduce their instability. A preliminary design of a linear quadratic regulator is presented as a solution to stabilize the system by using the solar sail only. Finally, invariant manifolds are exploited to identify orbits that present the opportunity of a ballistic transfer directly from low Earth orbit.
Original language  English 

Pages (fromto)  151180 
Journal  Celestial Mechanics and Dynamical Astronomy 
Volume  114 
Issue number  12 
Early online date  22 Jun 2012 
DOIs  
Publication status  Published  Oct 2012 
Keywords
 three body problem
 eightshaped orbits
 solar sailing
 polar observation
 periodic orbits
 visibility analysis
 stability
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Dive into the research topics of 'Natural and saildisplaced doublysymmetric Lagrange point orbits for polar coverage'. Together they form a unique fingerprint.Projects
 1 Finished

VISIONSPACE  VISIONARY SPACE SYSTEMS: ORBITAL DYNAMICS AT EXTREMES OF SPACECRAFT LENGTH SCALE (ERC ADVANCED GRANT)
McInnes, C.
European Commission  FP7  European Research Council
1/02/09 → 30/09/14
Project: Research