tokens: ['The', 'IE', 'EphemerisInfo', 'provides', 'satellite', 'ephemeris', 'Ephemeris', 'may', 'be', 'expressed', 'either', 'in', 'format', 'of', 'position', 'and', 'velocity', 'state', 'vector', 'in', 'ECEF', 'or', 'in', 'format', 'of', 'orbital', 'parameters', 'in', 'ECI', 'Note', 'The', 'ECI', 'and', 'ECEF', 'coincide', 'at', 'epochTime', 'ie', 'xyz', 'axis', 'in', 'ECEF', 'are', 'aligned', 'with', 'xyz', 'axis', 'in', 'ECI', 'at', 'epochTime', 'EphemerisInfo', 'information', 'element', '', 'ASNSTART', '', 'TAGEPHEMERISINFOSTART', 'EphemerisInfor', '', 'CHOICE', '', 'positionVelocityr', 'PositionVelocityr', 'orbitalr', 'Orbitalr', '', 'PositionVelocityr', '', 'SEQUENCE', '', 'positionXr', 'PositionStateVectorr', 'positionYr', 'PositionStateVectorr', 'positionZr', 'PositionStateVectorr', 'velocityVXr', 'VelocityStateVectorr', 'velocityVYr', 'VelocityStateVectorr', 'velocityVZr', 'VelocityStateVectorr', '', 'Orbitalr', '', 'SEQUENCE', '', 'semiMajorAxisr', 'INTEGER', '', 'eccentricityr', 'INTEGER', '', 'periapsisr', 'INTEGER', '', 'longituder', 'INTEGER', '', 'inclinationr', 'INTEGER', '', 'meanAnomalyr']