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International Earth Rotation and Reference Systems Service

Forthcoming meetings

Upcoming conferences and workshops relevant to the work of the IERS, covering topics such as Earth rotation, terrestrial and celestial reference frames, geophysical fluids, and the space geodetic techniques GNSS, SLR, VLBI, and DORIS.

Additional meeting calendars in geodesy, geophysics, and astronomy can be found under external meeting calendars.

A list of past meetings is also available.

2025 2026 2027 2028 2029 2030 2031

2025

Begin End Title Location
15 Dec 2025 19 Dec 2025 AGU 2025 Fall Meeting New Orleans, LA, USA

2026

Begin End Title Location
26 Jan 2026 29 Jan 2026 ION Precise Time and Time Interval Meeting (PTTI) Anaheim, CA, USA
02 Mar 2026 04 Mar 2026 IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG2026) Munich, Germany
05 Mar 2026 06 Mar 2026 GGOS/IERS Unified Analysis Workshop (UAW2026) Munich, Germany
12 Apr 2026 17 Apr 2026 IVS General Meeting Garmisch-Partenkirchen, Germany
13 Apr 2026 16 Apr 2026 ION Pacific Positioning, Navigation and Timing (PNT) Conference Honolulu, Hawaii, USA
03 May 2026 08 May 2026 EGU General Assembly 2026 Vienna, Austria
24 May 2026 29 May 2026 FIG Congress 2026 Cape Town, South Africa
01 Jun 2026 05 Jun 2026 IGS Workshop 2026 Santiago, Chile
23 Jun 2026 25 Jun 2026 EUREF Symposium 2026 Paris, France
01 Aug 2026 09 Aug 2026 46th COSPAR Scientific Assembly Florence, Italy
02 Aug 2026 07 Aug 2026 AOGS 23rd Annual Meeting Fukuoka, Japan
14 Sep 2026 18 Sep 2026 ION GNSS+ 2026 Orlando, FL, USA
28 Sep 2026 01 Oct 2026 TIGER (Tracking and Investigating Geodynamics and Earth Rotation) Symposium (1st symposium of the IAG Commission 3 on Earth Rotation and Geodynamics, in cooperation with the Journees meeting series) Gävle, Sweden
01 Oct 2026 30 Nov 2026 24th International Workshop on Laser Ranging [exact dates TBD] Buenos Aires, Argentina
05 Oct 2026 07 Oct 2026 GGOS Days 2026 Gävle, Sweden
07 Dec 2026 11 Dec 2026 AGU 2026 Fall Meeting San Francisco, CA, USA

2027

Begin End Title Location
25 Jan 2027 28 Jan 2027 ION Precise Time and Time Interval Meeting (PTTI) Anaheim, CA, USA
04 Apr 2027 09 Apr 2027 EGU General Assembly 2027 Vienna, Austria
23 May 2027 27 May 2027 FIG Working Week 2027 Stavanger, Norway
12 Jul 2027 22 Jul 2027 29th IUGG General Assembly Incheon, South Korea
25 Jul 2027 30 Jul 2027 AOGS 24th Annual Meeting Singapore
10 Aug 2027 19 Aug 2027 XXXIII IAU General Assembly Rome, Italy
20 Sep 2027 23 Sep 2027 International Data Week 2027 Cape Town, South Africa
20 Sep 2027 24 Sep 2027 ION GNSS+ 2027 Orlando, FL, USA
13 Dec 2027 17 Dec 2027 AGU 2027 Fall Meeting Washington, D.C., USA

2028

Begin End Title Location
24 Jan 2028 27 Jan 2028 ION Precise Time and Time Interval Meeting (PTTI) Monterey, CA, USA
23 Apr 2028 28 Apr 2028 EGU General Assembly 2028 Vienna, Austria
24 Jun 2028 28 Jun 2028 FIG Working Week 2028: Celebrating FIG 150th Anniversary Paris, France
08 Jul 2028 16 Jul 2028 47th COSPAR Scientific Assembly Dubai, UAE
11 Sep 2028 15 Sep 2028 ION GNSS+ 2028 Dallas, TX, USA
11 Dec 2028 15 Dec 2028 AGU 2028 Fall Meeting San Diego, CA, USA

2029

Begin End Title Location
22 Jan 2029 25 Jan 2029 ION Precise Time and Time Interval Meeting (PTTI) Monterey, CA, USA
08 Apr 2029 13 Apr 2029 EGU General Assembly 2029 Vienna, Austria
24 Sep 2029 28 Sep 2029 ION GNSS+ 2029 Dallas, TX, USA

2030

Begin End Title Location
28 Apr 2030 03 May 2030 EGU General Assembly 2030 Vienna, Austria
01 Aug 2030 31 Aug 2030 XXXIV IAU General Assembly [exact dates TBD] Santiago de Chile, Chile
09 Sep 2030 13 Sep 2030 ION GNSS+ 2030 San Diego, CA, USA

2031

Begin End Title Location
08 Sep 2031 12 Sep 2031 ION GNSS+ 2031 San Diego, CA, USA