International Association of Geodesy

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The International Association of Geodesy ( IAG ) is the international organization of scientific geodesy and is primarily responsible for coordinating its research activities and international services. It was founded in 1862 as the Central European Degree Measurement, expanded to include International Earth Measurement in 1886, and in 1919 it was integrated into the International Union for Geodesy and Geophysics (IUGG), which in turn belongs to the umbrella organization of the ICSU , initially as a section and in 1946 under its current name. Currently 70 countries are members of the IUGG and thus the IAG. The administration is at the German Geodetic Research Institute in Munich .

Structure of the IAG

  • Four commissions : Reference Frames, Gravity Field, Earth Rotation and Geodynamics, Positioning and Applications.
  • An inter-commission theory committee
  • A Global Geodetic Observation System ( GGOS )
  • A communication and contact industry

International services

  • IERS - International Service for Earth Rotation and Reference Systems ( Earth Rotation , Data Service)
  • IGS - International GNSS Service
  • ILRS - International Laser Ranging Service ( EDM to satellites and Earth's moon )
  • IVS - International VLBI Service for Geodesy and Astrometry (interferometry, radio astronomy )
  • IDS - International DORIS Service
  • IGFS - International Gravity Field Service
  • BGI - International Gravimetric Bureau (Bureau Gravimétrique International)
  • ICGEM - International Center for Global Earth Models
  • IDEMS - International Digital Elevation Model Service
  • IGETS - International Geodynamics and Earth Tide Service
  • ISG - International Service for the Geoid
  • PSMSL - The Permanent Service For Mean Sea Level ( sea ​​level , geoid)
  • BIPM - Bureau International des Poids et Mesures ( calibration , time services)

Every two years, one-week scientific symposia with several hundred participants and many individual conferences take place, of which every four years as part of the IUGG with several thousand participants.

There is also an intensive cooperation with the Fédération Internationale des Géomètres (FIG), which, in contrast to the IAG, represents the technical-geodetic side (see civil engineers or engineering geodesy ).

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