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News and Activities

GGOS IberAtlantic (GGOS IA) functions as a regional node of GGOS, focusing on geodetic activities across the Iberian Peninsula and the Atlantic region. GGOS IA fosters collaboration among geodetic institutions while promoting scientific research and technological development tailored to the region’s unique geophysical characteristics.

GGOS at #AGU25 – Call for Abstracts

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AGU american geophysical union© AGU

This year at #AGU25 (15-19 December 2025, New Orleans, USA), the Global Geodetic Observing System (GGOS) is once again hosting its own session

G004 | A Scientific and Observational Network for a Connected Planet: The Contribution of Geodesy to Earth System Monitoring

and warmly invites you to contribute! If your research advances geodesy’s role in Earth system monitoring, don’t miss this opportunity to share your work with the global scientific community. We welcome abstracts that explore the scientific and societal value of geodesy, including:

  • Integration of geodetic techniques such as GNSS, SLR, VLBI, DORIS, and gravimetry
  • Applications in mass transport, sea level change, crustal deformation, space water research, and geohazard monitoring
  • Advances in global reference frames and interoperable data/models
  • The expanding role of geodesy in the cislunar domain

This session is your chance to contribute to a global dialogue on how geodetic observations support climate research, hazard response, and scientific collaboration across disciplines. Join us and help shape the future of Earth system monitoring through geodesy!

🕒 Abstract Deadline: Wednesday, 30 July 2025 (23:59 EDT / 03:59 UTC)
👉 Abstract Submission: https://agu.confex.com/agu/agu25/prelim.cgi/Session/251493

Author: Martin Sehnal (Director of GGOS Coordinating Office)

Call for Abstracts: REFAG2026 – IAG Symposium on Reference Frames for Applications in Geosciences

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REFAG UAW

For the IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG2026), held from 2–4 March 2026 in Munich, Germany, co-located with the GGOS/IERS Unified Analysis Workshop (UAW2026) from 5-6 March 2026, we solicit contributions for the following topics:

The web page for registration and abstract submission for REFAG2026 is open, see

https://geodesy.science/events/munich2026/

Abstract submission deadline is 15. October 2025, Early Bird registration deadline is 15. December 2025.

We are looking forward to meet you in Munich!

Best regards

Urs Hugentobler, Xavier Collilieux, Krzysztof Sosnica, Mathis Bloßfeld

First Geodesy Cartoon Released

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Geodesy Cartoon

We’re excited to share the first release in our new cartoon series about geodesy: The New Height of Qomolangma (Mt. Everest). This cartoon offers an engaging and educational look at the long-standing debate between China and Nepal over the official height of Mt. Everest. Each country reported slightly different values based on their national height reference systems. Only through international cooperation and a shared global standard — the International Height Reference Frame (IHRF) — was it possible to reach a unified solution.

Why do height measurements differ between countries?
→ Learn more about height systems

What is a Height Reference Frame, and why is a global standard essential?
→ Explore the concept of the IHRF

Why does the IHRF Coordination Center matter?
→ Find out here

About the Series

This cartoon is part of a broader effort to raise awareness of geodesy through visual storytelling. To make this essential science more accessible, the International Association of Geodesy (IAG) and its Global Geodetic Observing System (GGOS) have launched a new multilingual cartoon series. The goal: to highlight geodesy’s critical role in understanding our planet.

→ Watch the Geodesy Cartoon website

More episodes are coming soon — stay tuned!

Author: Martin Sehnal (Director of GGOS CO)