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2. CLOHESSY, W.H. and WHLTSHIRE, R.S “Terminal Guidance System for Satellite Rendezvous,” Journal of the Aerospace Sciences, Vol. 27, No. 9, September 1960, pp. 653–658.
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4. SCHAUB, H., VADALI, S. R., JUNKINS, J.L. and ALFRIEND, K.T. “Spacecraft Formation Flying Control Using Mean Orbit Elements,” presented as paper AAS 9-310 at the AAS/AIAA Astrodynamics Specialist Conference, Girdwood, Alaska, August 16–19, 1999.
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