Geocentric Celestial Reference System

Target entity: Geocentric Celestial Reference System
Context triple: [IAU 1991 Resolution A4, defines, Geocentric Celestial Reference System]

• A. Barycentric Celestial Reference System
  The Barycentric Celestial Reference System is a relativistic, solar-system–centered coordinate framework used in astronomy and astrometry to precisely describe the positions and motions of celestial bodies with respect to the solar system’s center of mass.
• B. International Celestial Reference System
  The International Celestial Reference System is the standard, high-precision coordinate framework used in astronomy and geodesy to define positions of celestial objects relative to distant quasars.
• C. IERS ICRS Centre
  The IERS ICRS Centre is the component of the International Earth Rotation and Reference Systems Service responsible for realizing, maintaining, and providing access to the International Celestial Reference System used for precise astronomical and geodetic measurements.
• D. Geocentric Coordinate Time
  Geocentric Coordinate Time is a relativistic time scale used for calculations and measurements in the vicinity of Earth's center of mass, particularly in high-precision astronomy and satellite dynamics.
• E. IAU 1976 system of astronomical constants
  The IAU 1976 system of astronomical constants is a standardized set of numerical values and definitions adopted by the International Astronomical Union to ensure consistency in celestial mechanics, timekeeping, and other astronomical calculations.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Geocentric Celestial Reference System
Target entity description: The Geocentric Celestial Reference System is a relativistic, Earth-centered coordinate framework used in astronomy and space science to precisely describe the positions and motions of celestial objects as observed from Earth.

• A. Barycentric Celestial Reference System
  The Barycentric Celestial Reference System is a relativistic, solar-system–centered coordinate framework used in astronomy and astrometry to precisely describe the positions and motions of celestial bodies with respect to the solar system’s center of mass.
• B. International Celestial Reference System
  The International Celestial Reference System is the standard, high-precision coordinate framework used in astronomy and geodesy to define positions of celestial objects relative to distant quasars.
• C. IERS ICRS Centre
  The IERS ICRS Centre is the component of the International Earth Rotation and Reference Systems Service responsible for realizing, maintaining, and providing access to the International Celestial Reference System used for precise astronomical and geodetic measurements.
• D. Geocentric Coordinate Time
  Geocentric Coordinate Time is a relativistic time scale used for calculations and measurements in the vicinity of Earth's center of mass, particularly in high-precision astronomy and satellite dynamics.
• E. IAU 1976 system of astronomical constants
  The IAU 1976 system of astronomical constants is a standardized set of numerical values and definitions adopted by the International Astronomical Union to ensure consistency in celestial mechanics, timekeeping, and other astronomical calculations.
• F. None of above. chosen