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| International Geodynamics and Earth Tide Service | |
|---|---|
| Name | International Geodynamics and Earth Tide Service |
| Formation | 1958 |
| Type | Scientific organization |
| Headquarters | Strasbourg |
| Leader title | Director |
International Geodynamics and Earth Tide Service The International Geodynamics and Earth Tide Service is an intergovernmental scientific coordinating body that standardizes and distributes geodetic, gravimetric, and tidal data for Earth science. It supports research communities working on solid Earth dynamics, space geodesy, and geophysics through data stewardship and methodological development, interfacing with observatories, agencies, and research institutes.
The organization traces institutional roots to initiatives contemporaneous with the International Geophysical Year and collaborations among observatories such as Institut de Physique du Globe de Paris, Uppsala University, Royal Observatory of Belgium, United States Geological Survey, and National Astronomical Observatory of Japan, while early governance reflected models used by International Association of Geodesy, International Union of Geodesy and Geophysics, European Space Agency, National Aeronautics and Space Administration, and Deutsches GeoForschungsZentrum. Its structural evolution paralleled frameworks established by International Council for Science, International Science Council, World Meteorological Organization, Intergovernmental Oceanographic Commission, and International Hydrographic Organization. Organizational units interface with national programs at Scripps Institution of Oceanography, Pulkovo Observatory, Geological Survey of Canada, Geoscience Australia, and State Key Laboratory of Geodesy and Earth’s Dynamics. Leadership and advisory boards have included scientists affiliated with Massachusetts Institute of Technology, University of Cambridge, ETH Zurich, Carnegie Institution for Science, California Institute of Technology, and IPGP. Administrative headquarters and data centers coordinate with European Southern Observatory and regional observatories such as Geomagnetic Observatory Niemegk.
The service’s mission harmonizes standards for tidal modeling, gravity monitoring, and crustal deformation studies to support communities linked to International GNSS Service, International Laser Ranging Service, International VLBI Service, Global Geodetic Observing System, and Committee on Space Research. Core activities include development of models used by European Centre for Medium-Range Weather Forecasts partners, calibration workflows adopted by International Space Station experiments, and provision of metadata schemas compatible with World Data System repositories. Operational outputs inform programs at United Nations Office for Outer Space Affairs, Group on Earth Observations, Intergovernmental Panel on Climate Change, International Arctic Science Committee, and International Seismological Centre.
Data offerings encompass tidal constants, gravity time series, and Earth tide models compatible with datasets from GRACE, GRACE-FO, GOCE, Jason-3, and Sentinel-6. The service delivers standardized products interoperable with archives at National Oceanic and Atmospheric Administration, British Geological Survey, Institut national de l'information géographique et forestière, and Japan Meteorological Agency. Derived products support assimilation workflows used by European Space Agency missions, reference frame realizations aligned to International Terrestrial Reference Frame, and correction tables applied in analyses at Jet Propulsion Laboratory, European Centre for Medium-Range Weather Forecasts, and National Institute of Standards and Technology. Catalogs and APIs are designed to interoperate with systems at PANGAEA, GFZ German Research Centre for Geosciences, NOAA National Centers for Environmental Information, and EUMETSAT.
Instrument suites coordinated include superconducting gravimeters, absolute gravimeters, and long-period seismometers deployed at observatories such as Gravimetric Observatory Wettzell, Metsähovi Radio Observatory, Bureau International de l'Heure-era sites, and those operated by Institut de Physique du Globe de Strasbourg. Networks interconnect with International Federation of Digital Seismograph Networks, Global Geodetic Network, European Plate Observing System, Asian Seismological Commission stations, and tide gauge arrays administered by Permanent Service for Mean Sea Level. Calibration campaigns reference standards from International Bureau of Weights and Measures, instrument development involves partnerships with Heidelberg University, Leibniz Institute for Applied Geophysics, and manufacturers supplying equipment to Royal Observatory of Belgium and Observatoire de Paris.
Research supported spans Earth rheology, post-glacial rebound, and core-mantle coupling studied in conjunction with teams at University of California, Berkeley, University of Tokyo, Lamont–Doherty Earth Observatory, University of Oxford, and Seismological Society of America working groups. Applications include tidal correction of satellite altimetry for ICESat-2 analyses, crustal deformation studies for Japan Meteorological Agency seismic hazard assessments, and contributions to paleoclimate reconstructions used by Intergovernmental Panel on Climate Change authors. Methodological contributions have influenced numerical models employed by NOAA, inversion techniques used at Geological Survey of Canada, and interpretation frameworks adopted by United States Naval Observatory researchers.
The service maintains formal collaborations with entities including International Association of Geodesy, International Union of Geodesy and Geophysics, World Meteorological Organization, Group on Earth Observations, European Space Agency, National Aeronautics and Space Administration, Japan Aerospace Exploration Agency, Chinese Academy of Sciences, Russian Academy of Sciences, Indian Space Research Organisation, African Geophysical Commission, InterAmerican Network of Space Data Centers, and regional consortia hosted by European Commission projects. Cooperative agreements facilitate joint campaigns with International Seismological Centre, Global Seismographic Network, International Laser Ranging Service, and observatory networks managed by Instituto Geográfico Nacional (Spain), Observatoire de la Côte d’Azur, and Korea Astronomy and Space Science Institute.
Governance structures mirror models used by International Science Council, Committee on Space Research, and multilateral programs administered through offices of United Nations Educational, Scientific and Cultural Organization and World Meteorological Organization, with oversight from scientific councils composed of representatives from National Science Foundation, European Research Council, Deutsche Forschungsgemeinschaft, Japan Society for the Promotion of Science, Natural Sciences and Engineering Research Council of Canada, and ministries of science in member states. Funding sources combine contributions from national agencies such as NASA, ESA, DFG, CNRS, NSFC, and philanthropic foundations including Gordon and Betty Moore Foundation and Simons Foundation through project-based grants and core support mechanisms.
Category:Geophysics organizations