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In Memoriam: Professor Byron D. Tapley (1933–2026)

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Professor Byron Tapley (1932–2026), pioneer of space geodesy and GRACE Principal Investigator, passed away. He transformed Earth observation and satellite gravimetry. His scientific leadership, mentorship and legacy shaped generations worldwide.

Geodesy Glossary: A Reference Guide to Geodetic Terminology

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A living reference for geodetic terms and abbreviations, linked across IAG website for up-to-date explanations. We are open for updates, corrections, links and contributions from the community.

FIG Congress 2026

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Franck Ghomsi @ FIG Congress 2026   Franck Ghomsi, our early career representative (ECS) of the Inter-Commission Committee on Climate Research (ICCC), attended the recent FIG Congress and represented the IAG ECS group there. FIG is the…

Meet Jorge Martinez – Early Career Scientist

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Jorge Martinez is a Spanish aerospace engineer specializing in orbit determination and planetary science. He analyzes spacecraft data to reconstruct trajectories and study the internal structure and evolution of planets and moons. Currently working at the Royal Observatory of Belgium, he is preparing to pursue a PhD focused on advancing data processing methods and uncertainty estimation in space research.

Honorary colloquium for Prof. Torge and Prof. Seeber at Leibniz University Hannover

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Honorary colloquium on the occasion of the 95th birthday of Prof. Wolfgang Torge and the 85th birthday of Prof. Günter Seeber at Insitute of Geodesy, Leibniz University Hannover, Germany The keynote lecture "Hochstabile GNSS-Positionierung…

Geodesy Day – International Webinar on Geodesy

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“Every map ever drawn. Every satellite ever launched. Every border ever defined. All rest upon one science… Geodesy” About the Event What if the science that holds our modern world together remains largely invisible to those who…

Geodesy Cartoons – Free Resources for Education and Outreach

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Discover the Geodesy Cartoons by IAG & GGOS — freely available under CC-BY for education, outreach, presentations & science communication. And follow the weekly #CartoonOfTheWeek initiative.
NSL

Professor Vidal Ashkenazi OBE – Obituary

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Professor Vidal Ashkenazi OBE (1933–2026) was a pioneering geodesist and GPS researcher, founder of IESSG and NSL, whose work shaped satellite navigation, engineering surveying and Galileo.

Global Terrestrial Water Storage Anomaly Dataset Now Operationally Available via Copernicus

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A new global Terrestrial Water Storage Anomaly (TWSA) dataset became operationally available via the Copernicus Climate Data Store in April 2026. Developed through a decade of European GRACE/GRACE-FO collaboration, the dataset provides satellite-based observations of water storage changes across Earth’s surface and subsurface, supporting climate monitoring and future groundwater applications.

Meet Yuting Cheng – Early Career Scientist

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Yuting is a postdoctoral researcher at the Royal Observatory of Belgium working on the ambitious ESA GENESIS project. Her research centers on a unique satellite co-locating all four space geodetic techniques, creating a unified reference point in space. Her work contributes to improving the precision and stability of the International Terrestrial Reference Frame, while exploring how these observation systems perform together under novel space conditions.