Foreword: The IERS in 1999, by the Directing Board Chairman
- ORGANIZATION OF THE INTERNATIONAL EARTH ROTATION SERVICE
COORDINATING CENTRES
- Very Long Baseline Interferometry (VLBI)
- Lunar Laser Ranging (LLR)
- Global Positioning System (GPS)
- Satellite Laser Ranging (SLR)
- Doppler Orbit determinations and Radiopositioning Integrated on Satellite (DORIS)
BUREAUS
- Central Bureau
- Celestial System Section of the Central Bureau
- ITRF Section of the Central Bureau
- EOP Section of the Central Bureau
- Sub-Bureau for Rapid Service and Predictions
- Global Geophysical Fluids