B1. In support of the protection of geodetic radio astronomy against radio frequency interference
B2. Improvement of the Earth’s Rotation Theories and Models
B3. On the Gaia Celestial Reference Frame
1: The International Terrestrial Reference Frame (ITRF)
2: Third Realization of the International Celestial Reference Frame
5: Improvement of the Earth’s Rotation Theories and Models
The International Terrestrial Reference Frame (ITRF)
B1: Geocentric and International Terrestrial Reference Systems and Frames
B2: The Third Realization of the International Celestial Reference Frame
Global Geodetic Reference Frame
Second Realization of the International Celestial Reference Frame
Second Realization of the International Celestial Reference Frame
Second Realization of the International Celestial Reference Frame
1: Precession, nomenclature, and definition of TDB (Temps Dynamique Barycentrique)
2: Geocentric and International Terrestrial Reference Systems (GTRS and ITRS)
1: Precession Theory and Definition of the Ecliptic
2: Supplement to the IAU 2000 Resolutions on reference systems
3: Re-definition of Barycentric Dynamical Time, TDB
Adoption of the Resolutions B1.1 through B1.9 ofIAU 24th General Assembly, 2000
B1.1 Maintenance and Establishment of Reference Frames and Systems
B1.2 Hipparcos Celestial Reference Frame
B1.3 Definition of Barycentric Celestial Reference System and Geocentric Celestial Reference System
B1.4 Post-Newtonian Potential Coefficients
B1.5 Extended relativistic framework for time transformations and realisation of coordinate times in the solar system
B1.6 IAU 2000 Precession-Nutation Model
B1.7 Definition of Celestial Intermediate Pole
B1.8 Definition and use of Celestial and Terrestrial Ephemeris Origins
B1.9 Re-definition of Terrestrial Time TT
B2 Coordinated Universal Time
B1. On the use of Julian Dates and Modified Julian Dates
B2. Adopting the International Celestial Reference System (ICRS) and
charging the ICRS IAU Working Group (see resolution B4)
B3. On non-rigid Earth Nutation theory
B4. Creating the ICRS Working Group to study and make recommendations on
the consequences of the adoption of the ICRS
B5. On Relativity in Celestial Mechanics and in Astrometry
B6. Encouraging VLBI and LLR observations
International Earth Rotation Service (IERS)
I. Definition of systems of space-time coordinates within the framework of the General Theory of Relativity
II. Physical structures and quantities that will be used to establish the reference frames and time scales based upon the ideal definition of the system given by Recommendation I
III. Standardisation of the units and origins of coordinate times used in astronomy: Geocentric Coordinate Time (TCG) and Barycentric Coordinate Time (TCB)
V. Use of Barycentric Dynamical Time (TDB)
VI. Selection of extragalactic objects on which the conventional celestial barycentric reference system will be based
VII. Definition and realization of the conventional celestial barycentric reference system
VIII. Astronomical quantities, conventions, models, software, etc.
IX. Nutation angles: IAU conventional models and IERS observational results
No. 2: Conventional Terrestrial Reference System (CTRS)
No. 3: Rapid variations in Earth rotation
No. 5: VLBI and SLR observing campaigns in conjunction with the IGS work