Commission 1 - Reference Frames
Commission 3 - Earth Rotation and Geodynamics
Commission 4 - Positioning and Applications
Inter-Commission Committee on Theory (ICCT)
Communication and Outreach Branch (COB)
Gobal Geodetic Observing System (GGOS)
Bureau International de Poids et Mesures (BIPM)
International Altimetry Service (IAS)
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 (ILRS)
International VLBI Service for Geodesy and Astrometry (IVS)
Permanent Service for Mean Sea Level (PSMSL)
