The relative motion dynamics of a Coulomb satellite formation is considered. Electrostatic forces are exploited to control the relative motion. The formation angular momentum about an inertial point of reference and the formation center of mass are studied. The insights provide constraints on the relative motion description for both inertial and relative coordinates. The inertial formation center of mass motion is studied in more detail and compared to Keplerian motion. Finally, a coordinate frame is introduced which tracks the principal axes of the formation. This allows a convenient method to describe the formation shape at large.
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