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Paris, France, 23-25.06.2026

Presentations online
Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Paris, France, 23-25 June 2026
June 23
Tutorial - Quantum gravimetry
Sébastien Merlet
Tutorial - Chronometric Geodesy: Atomic clocks for levelling
Rodophe Le Targat

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Tutorial - Atomic clocks : application at IGN France
Olivier Jamet

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Opening Session
1.01 - Keynote speech
F. Perosanz
1.02 - Collaborations and sustainability
M. Lidberg, L. Huisman
1.03 - Galileo and EGNOS Performance Monitoring - Contributions from National Mapping Agencies
H. Koivula
1.04 - The Galileo High Accuracy Service (HAS): Performance Assessment within the GEMOP Initiative
A. Fantoni
1.05 - Sponsor speech - SATINFO 

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1.06 - Collaborations and sustainability
M. Lidberg, L. Huisman
1.07 - GRF Europe - Bridging Regional Geodetic Expertise and Global Geodesy Governance
J. Verbeurgt
1.08 - Collaborations and sustainability - round table
1.09 - Open poster session and National Reports
A. Araszkiewicz, X. Collilieux
1.10 - Open poster session and National Reports - Discussions & Drinks
A. Araszkiewicz, X. Collilieux
1.11 - National Report of Austria
H. Titz
1.12 - National Report of Estonia
K. Kollo
1.13 -Geodesy Cartoons: Visualizing Geodesy for Everyone
H. Titz
1.14 - National Report of Portugal 2026
H. Ribeiro
1.15 - Towards an update of the French vertical maritime reference surfaces
N. Portier
1.16 - National Report of Poland
K. Kalinczuk
1.17 - Real-Time GNSS Monitoring System for Poland (RTGMS)
K. Kalinczuk
1.18 - National Report of Spain
M. G. Hidalgo
1.19 - Great Britain National Report
M. Greaves
1.20 - Swiss Terrestrial Reference Frame CHTRF2022
L. Prange
1.21 - Modern Geodetic Reference Frame of Albania
B.  Oltjon  
1.22 - National Report of Finland
P. Häkli  
1.23 - From Service to Reference Frame: The Role of SWEPOS Post Processing Service in SWEREF 99 Realization
K. Ebuy Abraha, T. Nilsson, L. Jivall, C. Kempe, C. Lilje
1.24 - National Report of Belgium
J. Verbeurgt
1.25 - National Report of Slovenia to the EUREF 2026 Symposium in Paris
K. Medved
1.26 - Geodetic Observations and Geopotential Determination for the Optical Clock at BEV
H. Titz
1.27 - CEGRN meeting (Marcoux - Paris Cité University) - hybrid  
June 24
1.28 - Collaborations and sustainability
M. Lidberg, L. Huisman
1.29 - Report from IGS Workshop
R. Dach
1.30 - EPOS-GNSS products and consistency between the different solutions
A. SOCQUET
1.31 - Activities of the EUREF Governing Board
C. Bruyninx, W. Söhne
1.32 - Report on the Activities of the EUREF Governing Board
W. Soehne
1.33 - Current Status of the EUREF Permanent Network and Progress on EUREF Resolutions
C. Bruyninx

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1.34 - EPN Analysis Centres Coordinator Report
T. Liwosz

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1.35 - Activities of the EUREF Governing Board
C. Bruyninx, W. Söhne
1.36 - Report of the EPN Troposphere Coordinator
R. Pacione

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1.37 - Enhancement of the EUREF reference frame solution thanks to the EPN-Repro3
J. Legrand

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1.38 - EPN Densification: status and challenges after repro3
A. Kenyeres

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1.39 - EPND/CEGRN Analysis Hub
J. Zurutuza

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1.40 - Sponsor speech
Leica Geosystems

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1.41 - Sponsor speech
Teria
1.42 - Group picture - gather at the reception area
1.43 - Activities of the EUREF Governing Board
C. Bruyninx, W. Söhne
1.44 - EUREF-IP Real-time Data: Current Practice, Challenges, and Future Perspectives
L. Huisman

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1.45 - NTRIP-catalog - identify the Coordinate Reference System
J. Jimenez Shaw

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1.46 - EUREF Study Group on alternatives to ETRS89
X. Collilieux

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1.47 - Status report on the UELN: update on available data and schedule for the publication of a new EVRF
T. Bauer

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1.48 - Status report for the EUREF Working Group “European Unified Height Reference”
J. Schwabe

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1.49 - National and Local Activities (Amphitheatre 310)
K. Kollo, B. Garayt
1.50 - A contribution to the EPN Densification from Germany: Preliminary Results
D. De Louw
1.51 - National and Local Activities
K. Kollo, B. Garayt
1.52 - Towards Consistent Reference Frame Realizations: GNSS Reprocessing in Luxembourg, Belgium, and the Netherlands
H. De Ligt
1.53 - Updating the Spanish national reference frame: A reprocessed ETRF2000 solution based on ITRF2020
E. Azcue
1.54 - Lantmäteriet's Strategy for Geodesy 2026–2035
T. Kempe

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1.55 - Status report from the project to compute the new Serbian quasigeoid model SQM2026
J. Ågren
1.56 - Status report on the installation and testing of InSAR radar reflectors in Denmark
A. Meister

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1.57 - Towards the GNSS-InSAR integration in the Hungarian geodetic infrastructure
A. Kenyeres
June 25
1.58 - National and Local Activities - National reports
K. Kollo, B. Garayt
1.59 - National report of Lithuania
O. Jokubas, V. Gediminas
1.60 - National Report of Romania
M. Dulea-Flueras
1.61 - National report of Serbia
F. Kostadinovic, V. Nikolic
1.62 - National report of Slovakia
M. Ferianc
1.63 - National Report of Switzerland
A. Villiger
1.64 - National Report of the Czech Republic
J. Reznicek
1.65 - National Report of The Netherlands 2026
B. Alberts
1.66 - National Report of Germany
W. Soehne
1.67 - National report of France
J. de Oliveira Pinheiro
1.68 - National and Local Activities - National reports
K. Kollo, B. Garayt
1.69 - Discussion about ETRS89 alternatives
1.70 - Advancing Geodesy with EUREF: Research, Innovation and Future Perspective - J. Legrand, J. Schwabe
1.71 - Genesis: ESA's unique future geodetic satellite mission
G. Fusco
1.72 - IGS LEO-PNT Pilot Project: Preparing Geodetic Infrastructure and Products for Future LEO-PNT Integration
L. Massarweh
1.73 - Advancing Geodesy with EUREF: Research, Innovation and Future Perspective (Amphitheatre 310)
J. Legrand, J. Schwabe
1.74 - Impact of electromagnetic interferences on geodetic GNSS receivers: A comparative analysis among GPS, GLONASS, Galileo and BeiDou
M. Gianniou
1.75 - Multi-Source Fusion for Real-Time GNSS Interference Detection, Spoofing Classification, and Predictive Forecasting on a National CORS Infrastructure
M. Dulea-Flueras
1.76 - Multi-GNSS Analyses in the Time and Frequency Domains
J. Zurutuza
1.77 - An Automated Platform for GNSS Processing and Time-Series Analysis in a Complex Geodynamic Region
D. Anastasiou
1.78 - An Automated Platform for GNSS Processing and Time-Series Analysis in a Complex Geodynamic Region
D. Anastasiou
1.79 - CEGRN Status as of 2026
J. Zurutuza
1.80 - Preliminary GNSS Station Analysis and ETRFxx-Aligned Residual Velocity Assessment towards deformation modeling in Southern Iberia
J. Antonio Tarrío
1.81 - Advancing Geodesy with EUREF: Research, Innovation and Future Perspective 
J. Legrand, J. Schwabe
1.82 - The Future Datacenter: Motivation and Vision of the newly installed IGS Workinggroup on Data Architecture 
H. Titz
1.83 - Towards land and sea vertical unification thanks to hydrodynamic levelling 
J. Chenal
Closing session 
W. Söhne
Happy hour at IGN (Géoroom, IGN headquarters)
Photos
Photo from the meeting held in Paris in 2026