<ul><li>NASA has made Space Station trajectory data, called an ephemeris, available to the public.</li><li>The trajectory data is generated by the ISS Trajectory Operations and Planning Officer (TOPO) flight controllers to track the ISS's position and ensure it doesn't collide with other objects in space.</li><li>TOPO updates the predicted trajectory approximately three times a week to minimize errors caused by the thin atmosphere at the ISS's altitude.</li><li>The trajectory data is provided in the CCSDS Orbital Ephemeris Message (OEM) standard and includes information on the ISS's position, velocity, and upcoming translation maneuvers and visiting vehicle activities.</li></ul>

Space Station Trajectory Data

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