The growing population of space debris poses a serious risk to the future of space flight. To effectively managethe increase of debris in orbit, end-of life disposal has become a key requirement for future missions. This posesa challenge for Medium Earth Orbit (MEO) spacecraft which require a large Δv to re-enter the atmosphere orreach the geostationary graveyard orbit. This paper further explores a passive strategy based on the joint effectsof solar radiation pressure and the Earth's oblateness acting on a high area-to-mass ratio object. The conceptwas previously presented as an analytical planar model. This paper uses a full 3D model to validate the analyticalresults numerically for equatorial circular orbits first, then investigating higher inclinations. It is shown that forhigher inclinations the initial position of the Sun and right ascension of the ascending node become increasinglyimportant. A region of very low required area-to-mass ratio is identified in the parameter space of semi-majoraxis and inclination which occurs for altitudes below 10,000 km.
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