Commission 1 - Reference Frames
Commission 3 - Earth Rotation and Geodynamics
Commission 4 - Positioning and Applications
Inter-Commission Committee an Theory (ICCT)
Communication and Outreach Branch (COB)
Global Geodetic Observing System (GGOS)
Bureau International de Poids et Measures (BIPM)
International Altimetry Service (IAS)
International Bibliography Service (IBS)
International Centre for Earth Tides (ICET)
International Centre for Global Earth Models (ICGEM)
International Digital Elevation Model Service (IDEMS)
International DORIS Service (IDS)
International Earth Rotation and Reference Systems Service (IERS)
International Geoid Service (IGeS)
International GNSS Service (IGS)
International Gravimetric Bureau (BGI)
International Gravity Field Service (IGFS)
International Laser Ranging Service
International VLBI Service for Geodesy and Astrometry (IVS)
Permanent Service for Mean Sea Level (PSMSL)
Meetings and Annual Reports of the IAG Secretary General
