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| Toolkit | Best For | Key Feature | |--------|-----------|------------------| | (General Mission Analysis Tool) | Orbital design, trajectory optimization | Used by NASA for real missions like LRO and OSIRIS-REx | | Orekit | Low-level orbital propagation (Java/Python) | High accuracy, used in ground segments | | OpenSph | Space physics & N-body simulations | SPH fluid dynamics for astrophysics | | ESA's Celestlab | Covariance analysis & collision avoidance | European Space Agency quality |

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