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GGOS Days 2025 | Report

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The GGOS Days 2025 took place on 3–5 September within the IAG2025 Scientific Assembly in Rimini, Italy. The event featured five symposia and a highlight session on global geodetic infrastructure, standardization, regional collaboration, AI, space weather, and geohazards. Sessions on Geodesy for Society emphasized data management, policy engagement, and communication, highlighting geodesy’s role in sustainable development. The GGOS Governing Board and Science Panel met in hybrid format to review the implementation plan, update outreach materials, and coordinate capacity-building efforts. Read the full report for details.
VLBI GNSS Onsala Sweden

The Visibility Challenge of Geodesy

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Geodesy quietly underpins our modern world - from GNSS navigation to climate monitoring and digital twins. The new article “The Visibility Challenge of Geodesy” in the GIM International Magazine (Issue 4 2025) explores the global infrastructure behind geodesy and highlights initiatives to make it more visible and accessible to surveyors, geomatics professionals, and the wider geospatial community.
GGOS IberAtlantic School 2025

Highlights from 1st GGOS IberAtlantic Summer School

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The Yebes Observatory hosted GGOS IberAtlantic’s inaugural Summer School on space geodesy for early-career researchers from Spain and Portugal. Over five days, participants explored GNSS, VLBI, SLR, and gravimetry through theoretical and hands-on sessions, while cultural activities fostered collaboration. The event successfully strengthened geodetic skills, inspired scientific vocations, and built networks across the Ibero-Atlantic region.
Geodesy Cartoon Competition

Geodesy Cartoon Competition

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Join the Geodesy Cartoon Competition and turn complex science into creative, engaging visuals. Whether you're a scientist or an artist, this is your chance to make geodesy fun and accessible. Win up to 900€, gain international visibility, and help others understand why geodesy matters. Open to all!

Satellite Laser Ranging – How SLR Powers Geodesy

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Discover Satellite Laser Ranging (SLR) – lasers from ground stations measure satellite and Moon positions with millimeter precision. SLR supports the Terrestrial Reference Frame, tracks Earth rotation, tectonic motion, improves gravity and sea level models, and tests relativity. Explore the science behind these precision measurements in our Geodesy Cartoon.
Africa Workshop

South African National Geodesy Workshop

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South Africa, with a rich geodetic history, faces fragmented efforts. A National Geodesy Workshop aims to unite stakeholders, enhance coordination, and align with the UN's GGRF agenda—establishing a National Geodesy Working Group to support national development and global collaboration in geodesy.
Funding Money coins

Call for IAG proposals – IUGG Support Program of Scientific Meetings in 2026

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The IUGG invites proposals for support of selected scientific meetings in 2026, including workshops, schools, and symposia. Submissions via IAG must be sent by 10 September 2025 to IAG-Office. Meetings should be scientifically relevant, internationally oriented, inclusive, and multi-disciplinary.

GGOS Days 2025 – Invitation

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Join us for GGOS Days 2025, held 1–5 September in Rimini, Italy, alongside the IAG2025 Scientific Assembly. Discover the latest GGOS achievements and challenges, connect with the community, and access contributions later in the GGOS Cloud.

Geodesy Virtual School 2025 – Summary

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The 2025 Geodesy Virtual School focused on reference frames and Earth system monitoring, held in five free online sessions coordinated from Argentina with support from SIRGAS, IAG, IUGG, and others. It featured 37 instructors and global participation, especially from the Americas. All lectures, in English or Spanish with subtitles, are available online, promoting inclusive, high-quality geodetic training worldwide.
Geodesy Cartoon

Lost Without Geodesy

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What happens if geodesy disappears? Phones, planes, and warning systems would fail. Our cartoon “Lost Without Geodesy” shows how vital this invisible science is. Geodesy powers GNSS, enabling precise positioning, earthquake monitoring, sea level studies, and more. Without it, GNSS would drift and global systems would collapse.