Projects per year
Abstract
This paper investigates the effect of planetary oblateness and solar radiation pressure on the orbit of high areatomass spacecraft. A planar Hamiltonian model shows the existence of equilibrium orbits with the orbit apogee pointing towards or away from the Sun. These solutions are numerically continued to nonzero inclinations and considering the obliquity of the ecliptic plane relative to the equator. Quasifrozen orbits are identified in eccentricity, inclination and angle between the Sunline and the orbit perigee. The longterm evolution of these orbits is then verified through numerical integration. A set of ‘heliotropic’ orbits with apogee pointing in direction of the Sun is proposed for enhancing imaging and telecommunication on the day side of the Earth. The effects of J2 and solar radiation pressure are exploited to obtain a passive rotation of the apsides line following the Sun; moreover the effect of solar radiation pressure enables such orbits at higher eccentricities with respect to the J2 only case.
Original language  English 

Pages  Article IAC11.C1.4.8 
Number of pages  17 
Publication status  Published  3 Oct 2011 
Event  62nd International Astronautical Congress 2011  Cape Town, South Africa Duration: 3 Oct 2011 → 7 Oct 2011 
Conference
Conference  62nd International Astronautical Congress 2011 

Country  South Africa 
City  Cape Town 
Period  3/10/11 → 7/10/11 
Keywords
 solar radiation pressure
 J2
 frozen orbit
 heliotropic orbit
 antiheliotropic orbit
 SpaceChip
 ChipSat
 high areatomass spacecraft
 sunsynchronous
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 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