name: ECI
full_form: Earth-Centered-Inertial
context: 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, i.e., x,y,z axis in ECEF are aligned with x,y,z axis in ECI at epochTime. EphemerisInfo information element -- ASN1START -- TAG-EPHEMERISINFO-START EphemerisInfo-r17 ::= CHOICE { positionVelocity-r17 PositionVelocity-r17, orbital-r17 Orbital-r17 } PositionVelocity-r17 ::= SEQUENCE { positionX-r17 PositionStateVector-r17, positionY-r17 PositionStateVector-r17, positionZ-r17 PositionStateVector-r17, velocityVX-r17 VelocityStateVector-r17, velocityVY-r17 VelocityStateVector-r17, velocityVZ-r17 VelocityStateVector-r17 } Orbital-r17 ::= SEQUENCE { semiMajorAxis-r17 INTEGER (0..8589934591), eccentricity-r17 INTEGER (0..1048575), periapsis-r17 INTEGER (0..268435455), longitude-r17 INTEGER (0..268435455), inclination-r17 INTEGER (-67108864..67108863), meanAnomaly-r17
description: Earth-Centered-Inertial (ECI) is a coordinate system used to describe the position and velocity of satellites in space. It is one of the formats used to express satellite ephemeris, which are provided by the EphemerisInfo information element in the 3GPP TS 38.331 specification.
explanation: The context describes ECI as a coordinate system for satellites, not directly related to telecommunications infrastructure or protocols. It's a technical concept used in space navigation and falls under 'Miscellaneous'.
section_title: âEphemerisInfo
biotag_Context: O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,B-Miscellaneous,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,B-Specification,O,O