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Space station viewing 202112/3/2023 ![]() ![]() Following this is a listing of upcoming ISS translation maneuvers, called “reboosts,” and visiting vehicle launches, arrivals, and departures.Īfter the header, ISS state vectors in the Mean of J2000 (J2K) reference frame are listed at four-minute intervals spanning a total length of 15 days. The header also contains lines with details for the first and last ascending nodes within the ephemeris span. Each file contains header lines with the ISS mass in kg, drag area in m 2, and drag coefficient used in generating the ephemeris. The ephemeris is in the CCSDS Orbital Ephemeris Message (OEM) standard and is available in. The links above and below are to the most current posted ephemeris. An accurate trajectory is essential for maintaining communications links, planning visiting vehicle rendezvous, and ensuring ISS’s path is clear of any potential collisions. Because of this, TOPO updates the predicted trajectory approximately three times a week, so the ISS Flight Control Team has the best trajectory estimate possible. This thin atmosphere creates drag and over time can cause TOPO’s predicted ISS trajectory to accumulate error. At ISS’s altitude, a very thin atmosphere is still present. ![]() TOPO keeps track of where the ISS is, where it is going to be, and most importantly makes sure it isn’t at risk of colliding with other objects in space. ISS trajectory data is now available to the public! This data, called an ephemeris, is generated by the ISS Trajectory Operations and Planning Officer (TOPO) flight controllers in the Mission Control Center at NASA’s Johnson Space Center. International Space Station above the Atlantic Ocean. ![]()
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