Reads an Ephemeris from the CCSDS OEM text NASA publishes for the ISS: a
header, one metadata block, comments, then one line per state vector.
Throws EphemerisError when the text is not such a file, is not in the
J2000 frame and UTC, or its vectors are unreadable, out of order or
implausible, so that a caller never keeps a corrupt Ephemeris in place of
a good one.
Reads an Ephemeris from the CCSDS OEM text NASA publishes for the ISS: a header, one metadata block, comments, then one line per state vector. Throws EphemerisError when the text is not such a file, is not in the J2000 frame and UTC, or its vectors are unreadable, out of order or implausible, so that a caller never keeps a corrupt Ephemeris in place of a good one.