The effect of aerodynamic lift on near circular satellite orbits

Physics

Scientific paper

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Circular Orbits, Gas-Solid Interfaces, Lift, Orbit Perturbation, Satellite Orbits, Ers-1 (Esa Satellite), Euler-Lagrange Equation, Flat Surfaces, Satellite Drag, Satellite Orientation, Skylab 1, Solar Activity Effects, Solar Collectors

Scientific paper

A theory is developed to evaluate the effect of aerodynamic lift on near circular satellite orbits. Consideration is given to a flat surface at constant altitude with respect to the velocity vector; and a sun oriented plate. In both cases the gas-surface interaction was restricted to diffuse or specular reflection. Numerical results are also presented for the nominal orbit of the ERS 1 satellite. It is shown that radial perturbations of the order of 1 cm every 5 days are likely during periods of moderate solar activity. During periods of high solar activity, however, a 10-fold increase in the severity of the effect is predicted. The effects of aerodynamic lift on stabilized satellites at altitudes of less than 800 km are illustrated in a hypothetical study of the orbital inclination of Skylab 1.

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