Increasing international cooperation in the areas of orbital collision avoidance and electro-magnetic interference mitigation has driven the exchange of satellite ephemerides to support Space Situational Awareness, threat detection, and avoidance. To be useful, ephemerides must conform to certain specifications in order to ensure that the intended precision of these analyses is achieved. This paper examines the accuracy of various interpolation methods as a function of ephemeris step size and ephemeris numerical precision for a variety of orbital regimes.
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