The online NASA published ISS OEM format fails to be parsed in XML format (works in text format). "org.orekit.errors.OrekitException: unsupported format for file XXX.xml". I have not had time to investigate further. Source: https://spotthestation.nasa.gov/trajectory_data.cfm [ISS.OEM_J2K_EPH.xml](/uploads/30dd11966d99fa387835ff7bc2925c72/ISS.OEM_J2K_EPH.xml) [ISS.OEM_J2K_EPH.txt](/uploads/f5ea80708db9f115de15ca4170e45798/ISS.OEM_J2K_EPH.txt)