[IGSMAIL-8563] Geodetic Infrastructure @IAG Scientific Assembly 2025

[Rodríguez Pérez José Carlos]

Dear geodesy colleagues,

We wish to call your attention to session G06-2: "Global Geodetic Infrastructure for Earth System Monitoring" of Symposium 6 "Global Geodetic Observing System" at the IAG Scientific Assembly in Rimini (Italy, 1-5 September 2025).

The geodetic infrastructure is the foundation stone without which our observations, products and flow of data would just not exist. We are eager to hear about any developments in this area that contribute to an improvement of geodetic infrastructure, its quality or capabilities, successful deployment stories, simulation studies, new concepts, and everything else related to this topic.

Please find below the description of this session, and do send us your abstract by March 15th. You can find all the details about the IAG Scientific Assembly, including abstract guidelines and submission information, here:

https://eventi.unibo.it/iag2025

Hoping for your participation and to seeing you in Rimini.

Best regards,

José Rodríguez
Martin Lidberg
Lucia McCallum
Cornelia Eschelbach


G06-2: Global geodetic infrastructure for Earth System Monitoring

The Global Geodetic Observing System (GGOS) of the IAG provides measurements of the static and time-varying shape, orientation and gravity field of the Earth, using geodetic instrumentation located on the ground and onboard spacecraft. The deployment of the observing networks, technological developments, multi-technique integration, and improvements in modelling capabilities have all led to geodesy being able to provide critical contributions, both scientifically and for wide societal benefit. The refinement in the applications and use cases that depend on geodetic products, especially in science areas concerned with global change (e.g. global water cycle, sea level, climate change), or the monitoring and early warning of geohazards, impose stringent requirements on the products provided by GGOS. What makes this all possible, i.e. the set of observatories, analysis, data and combination centres, and the human resources involved, is what the United Nations Global Geodesy Centre of Excellence calls the Global Geodesy Supply Chain. The infrastructure part of this supply chain, at the GGOS level, is overseen by the GGOS Bureau of Networks and Observations.

Among the most prominent products of the geodesy supply chain are the various reference frames (geometry, height, gravity) required to provide a common link in space and time for scientific observations, as well as for applications such as positioning and navigation on land, sea, air and space. Other than the constant upkeep and modernisation of the geodetic supply chain, the increasing demands in precision, accuracy and consistency make it paramount that any systematic errors within and between the techniques be identified and resolved, paving the way to the GGOS requirements of 1 mm and 0.1 mm/yr (or equivalent). In this session, we solicit contributions on the infrastructure aspects of the global geodetic observing system, such as:

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Advances in space geodesy technology.
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Progress and updates of the networks of the IAG Services, including national networks.
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New space missions with geodetic relevance and related supporting infrastructure.
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Infrastructure for the realisation of the height and gravity reference systems.
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Local geodetic surveys and progress on space ties.
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Detection and mitigation of systematic errors.
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Simulation results showing pathways to achieve the GGOS goals.

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