name: ECEF
full_form: Earth-Centered, Earth-Fixed
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: ECEF (Earth-Centered, Earth-Fixed) is a coordinate system used for expressing satellite ephemeris information. It defines positions in space relative to the center of the Earth and remains fixed with respect to the Earth's rotation.
explanation: ECEF is a specific type of coordinate system used in telecommunications, particularly for satellite positioning and tracking.
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