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  • Geoid School Kazakhstan 2025

    15th International School on “The Determination and Use of the Geoid”


    Commission 2

    Dear Colleagues, We are glad to inform you that the International Service for the Geoid (ISG) has organized a new edition of the traditional International School on “The Determination and Use of the Geoid”. It has been planned in cooperation with the Institute of Ionosphere (Almaty, Kazakhstan), which fostered this initiative. Please share this announcement […]

  • China Wuhan

    3rd IAG Commission 4 Symposium: Positioning and Applications


    Wuhan, China
    Commission 4

    The 3rd IAG Commission 4 Symposium: Positioning and Applications, will take place from 13 to 15 May, 2025, in Wuhan, China. As a continued Symposium Series of IAG Commission 4, this event will bring together scientists, researchers, and professionals working across the diverse field of positioning and its applications. The symposium a aims to foster […]

  • 2025 Glacial Isostatic Adjustment workshop: Advancing Models and Observational Constraints


    Sidney, CA Sidney, Canada
    Commission 3

    We are excited to announce that registration for the “2025 Glacial Isostatic Adjustment workshop: Advancing Models and Observational Constraints” taking place on June 2nd to 6th, 2025, in Sidney (British Columbia, Canada) & online, is now open. To register, please visit our website at https://polenet.org/2025-gia-workshop-registration/. Please note that space is limited by the physical capacity […]

  • Virtual School of Geodesy – Reference Frames, Geodynamics, Atmosphere


    📚 Education & Training

    🎯 Course Objective: The objective of the 2025 School is to provide the most important concepts on the definition, implementation, and maintenance of global, continental, and national reference frameworks, as well as their importance in various applications. It will also address advances in Earth System monitoring in response to the challenges posed by climate change, […]

  • IGS Logo

    Tour de l’IGS 7th Stop: Spotlight on Africa


    Commission 1

    This 7th stop focuses on the African continent. Virtual Organising Committee: Fernand Balé (Bureau National d’Etudes Techniques et de Développement, Côte d’Ivoire) and Babatunde Rabiu (National Space Research and Development Agency, Nigeria). Registration: https://forms.gle/A5nyo8g9sjUDog3D9.

  • EUREF Reference Frame IAG

    EUREF Symposia 2025 + AC Workshop


    University Beira Interior, Covilh Covilh, Portugal
    Commission 1

    The Local and Scientific Organizing Committees are pleased to announce that the next EUREF Symposium will take place from 24 to 26 June 2025, at the University of Beira Interior, in Covilhã, Portugal. This event will take place in two parts: 24th June: a technical Analysis Centre & Repro3 Workshop (hybrid) 25-26th June: the Symposium […]

  • ESA Living Planet Symposium 2025

    • Sponsorship/Co-Organised:
    • ESA
    • NASA

    ESA's Living Planet Symposium 2025(LPS) - Austria Center Vienna (ACV) Vienna, Austria
    Commission 2

    ESA-NASA Joint session C.02.05 “MAGIC – Preparing for the ESA-NASA satellite gravity constellation”. 25/06/2025, Part 1, 14:00 - 15:30, Room 0.94/0.95 25/06/2025, Part 2, 16:15 - 17:45, Room 0.94/0.95 A.10.02 "Geodetic satellite missions and their applications" 25/06/2025, Part 1, 8:30 – 10:00, Hall E1 25/06/2025, Part 2, 8:30 – 13:00, Hall E1

  • Summer School on “Satellite-based Hydrological Data Assimilation”

    • Sponsorship/Co-Organised:
    • DANSk-LSM project

    Aalborg University Aalborg, Denmark
    📚 Education & Training

    We are thrilled to announce the upcoming Summer School on "Satellite-based Hydrological Data Assimilation", specifically designed for early career scientists (MSc, PhD, and Postdoctoral researchers). This exciting event will be hosted […]

  • GRACE Satellite

    GRACE Hackweek 5


    📚 Education & Training

    An online school on time-variable gravity from GRACE and GRACE-FO satellite missions Satellite gravimetry has become an indispensible tool for studying the earth system. The satellite missions CHAMP, GRACE/GRACE-FO and […]

  • GRACE-FO Science Team Meeting 2025

    • Sponsorship/Co-Organised:
    • NASA

    University of Colorado, Boulder Boulder, USA
    Commission 2

    The 2025 GRACE-FO Science Team Meeting will take place from Oct 7-9, 2025, in Boulder, CO (USA), at the University of Colorado, Boulder, in the Village Center! This meeting will be held in hybrid mode (i.e., in-person with live-remote options). Event Category: igfs

  • XVI SIRGAS School “VLBI and SLR Data Processing”

    • Sponsorship/Co-Organised:
    • IAG; IUGG; IAGA; PAIGH

    Facultad de Ingeniería - Universidad Nacional de San Juan Av. Libertador Gral. San Martín 1109, J5400ARL San Juan, Argentina, San Juan, Argentina
    📚 Education & Training

    The XVI SIRGAS School will be held in the beautiful city of San Juan, Argentina, with the aim of training professionals in the field of geodesy through the processing of VLBI (Very Long Baseline Interferometry) and SLR (Satellite Laser Ranging) data, key techniques for the definition of global reference frames. The purpose of this course is to provide […]

  • “Talks on GIA” seminar


    📚 Education & Training

    "Talks on GIA" seminar - Constraining GIA where the mantle is heterogeneous AND Community Priorities for GNSS Measurements We will have two presentations. Erica Lucas (University of California, Santa Cruz, USA) will present "Constraining Glacial Isostatic Adjustment where the mantle is heterogeneous". Terry Wilson (Ohio State University, Columbus, USA) will present "Community Priorities for GNSS […]

  • “Talks on GIA” seminar


    Commission 3

    Helio Guerra Neto and Jeff Freymueller from Michigan State University, East Lansing, USA, will present "GIA in the Great Lakes Basin: A Geodetic Perspective on Vertical Motion and Hydrological Loading" Vertical crustal motion in the Great Lakes Basin, North America, results from a combination of ongoing Glacial Isostatic Adjustment (GIA) and environmental and hydrological loadings. […]

  • “Talks on GIA” seminar 3


    Commission 3

    Mirjam Bilker-Koivula (Finnish Geospatial Research Institute) and Holger Steffen (Lantmäteriet, Sweden), will present "The Whys and Hows of Dealing with Glacial Isostatic Adjustment in a Mapping Authority" Glacial isostatic adjustment (GIA) affects among others vertical datums, sea-level measurements, GNSS heights, and crustal motion models. Hence, it creates technical and practical challenges for mapping agencies. They […]

  • GNSS-EPOS Webinar, with Dr. Marianne Métois


    Commission 3

    We are pleased to invite the GNSS-EPOS community to the inaugural session of our 2026 webinar series, featuring guest speaker Dr. Marianne Métois from the Laboratoire de Géologie de Lyon. Presentation Title: "Tracking very slow deformation of continental Europe with GNSS: challenges and perspectives" Event Details: Date: Monday, 23rd February 2026 Time: 10:00 – 11:00 […]

  • UAW REFAG Munich 2026

    Munich 2026 | REFAG Symposium + Unified Analysis Workshop UAW


    LDBV - Landesamt für Digitalisierung, Breitband und Vermessung Alexandrastraße 4, Munich, Germany
    Commission 1

    The Technical University of Munich (TUM) is proud to lead global geodetic research as it currently holds the presidents of Commission 1 “Reference Frames” of the International Association of Geodesy (IAG) and the IAG Global Geodetic Observing System (GGOS). In this prominent role, TUM is excited to host two landmark events in 2026: The IAG […]

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • and PALSEA.
    • SCAR-INSTANT Theme 2

    Commission 3

    Paul Tregoning (Australian National University, Canberra, Australia), will present "A tool to assess the accuracy of glacial isostatic adjustment predictions of present-day crustal uplift rates" While there are many global and regional glacial isostatic adjustment (GIA) models available that can be used to compute expected present-day uplift rates of the surface of the Earth, they […]

  • Tracking Mountain Aquifer using Space Geodesy

    • Sponsorship/Co-Organised:
    • IAG

    Commission 3

    Tracking Mountain Aquifer Storage and Discharge Using Space Geodesy: Using high-precision GNSS surface displacements, this study quantifies groundwater storage changes in the Sierra Nevada and Cascade ranges. Results show long-term depletion due to droughts but rapid recharge during extreme precipitation events, which can restore and sustain groundwater storage and influence regional water supply and ecosystem resilience.

  • EPOS days 2026


    Palazzo Doglio hotel conference centre Cagliary, Italy
    📚 Education & Training

    EPOS Days is the flagship annual conference of the European Plate Observing System (EPOS), bringing together researchers, data providers, and infrastructure developers from across Europe to advance collaboration in solid Earth science. The event serves as a key forum to discuss the evolution of EPOS as a pan-European research infrastructure and to showcase progress in […]

  • Hydrologic Signature in Geodetic Observations

    • Sponsorship/Co-Organised:
    • Commission 3
    • IAG
    • WG3.1 Hydrologic Signature in Geodetic Observations

    Commission 3

    We announce a seminar by Wenjin Chen on algorithms and software for efficient gravity forward modeling of hydrological mass changes. The talk reviews methods in Cartesian and spherical systems, comparing accuracy and efficiency of modeling approaches, and highlights trade-offs between realism and computation, with applications to hydrological mass change analysis.

  • Postponed PhHS-IHRF2026 – Int. Symposium on Physical Height Systems and the IHRF

    • Sponsorship/Co-Organised:
    • GGOS
    • IAG SC2.2
    • IGFS
    • IHRF CC
    • SC2.4

    General Authority for Survey and Geospatial Information (GEOSA) Riyadh, Kingdom of Saudi Arabia
    Commission 2

    The PhHS-IHRF2026 symposium will be held in Riyadh, Saudi Arabia from 7-9 April 2026. It focuses on observing and interpreting the Earth's gravity field and geoid, emphasizing height systems and the International Height Reference Frame (IHRF). This Joint IAG Symposium is co-organized by IAG Sub-Commissions 2.2 and 2.4, IGFS, and GGOS.

  • International Scientific Conference


    University of Latvia, House of Sciences Jelgavas str. 3, Riga, Latvia
    Commission 2

    This conference explores Earth’s internal and external processes and their interaction with the space environment. It covers crust and mantle dynamics, tectonics, seismicity, and variations in gravitational and magnetic fields, as well as satellite and geodetic methods, fostering interdisciplinary collaboration across geophysics, geology, geodesy, and space sciences.

  • ENC2026 European Navigation Conference

    • Sponsorship/Co-Organised:
    • ENC
    • EUGIN
    • OVN

    Austria Center Vienna Bruno-Kreisky-Platz 1, Vienna, Austria
    Commission 4

    We are pleased to announce the next edition of the European Navigation Conference series, ENC 2026, will take place in Vienna, April 28-30, 2026. The ENC-series is now widely acknowledged as the most important annual event in Europe bringing together the full positioning, navigation and timing community. What you can expect at ENC2026: Technical programme across […]

  • Talks on GIA Seminar

    • Sponsorship/Co-Organised:
    • PALSEA.
    • SCAR-INSTANT Theme 2

    Commission 3

    Allie Coonin (Brown University, Providence, USA) and Tamara Pico (University of California, Santa Cruz, USA) will present: "Transient Earth Rheology Temporarily Slows West Antarctic Ice Retreat in Future Climate Projections" Projections of sea-level change and Antarctic Ice Sheet (AIS) stability under anthropogenic climate change hinge upon accurately describing physical feedbacks that link ice dynamics (marine […]

  • Hydrologic Signature in Geodetic Observations

    • Sponsorship/Co-Organised:
    • University of Trieste

    Commission 3

    We are pleased to announce our third seminar hosted by the IAG Working Group 3.1. Christian Massari will present on hydrologic variability in Europe and beyond using satellites and in situ sensors. The seminar will be held on May 13; further details and the link will be provided later.

  • EU-wide Community Workshop on Quantum Gravimetry


    GFZ Helmholtz Centre for Geosciences Telegrafenberg, Potsdam, Germany
    Commission 2

    This in-person workshop is organized with the main objective to obtain feedback by the entire European community. Opinions, comments and thoughts on EQUIP-G project activities will contribute to shaping key aspects on the future of (terrestrial) gravimetry. This is centered around the main long-term goal to establish a permanent perennial entity of a shared park […]

  • EUREF Symposium 2026


    ENSA Paris-Val de Seine 3/15, quai Panhard et Levassore, Paris, France
    Commission 1

    EUREF is the International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe. The EUREF Symposium has been organized since 1990 and the scope of the symposium covers EUREF activities, such as the realisation, maintenance, and usage of ETRS89, EVRS and the EUREF Permanent Network. More Info - Event Website: https://euref2026.sciencesconf.org/  

  • Summer School: satellite-based hydrological data assimilation

    • Sponsorship/Co-Organised:
    • Aalborg University

    Geodesy group, Aalborg University Rendsburggade 14, Aalborg, Denmark
    📚 Education & Training

    Geodesy group of Aalborg University is planning to have a summer school at the Geodesy Group, Aalborg University, August 25-28 2026. The school will be for four days and focusing on training Early Careers to improve their skill of satellite data processing and hydrological data assimilation. The program will be ~50%-50% on theory and practical […]