The activities started in 2008 with an IAG Inter-Commission Project and have been continued as Joint Working Group with IGFS, BGI and IGETS in IAG Subcommission 2.1 on Terrestrial Gravimetry.
The fundamentals are documented below.
2023 Berlin: IAG Resolution for the International Terrestrial Gravity Reference System (ITGRS)
2015 Prague: IAG Resolution 2: Establishment of a global absolute gravity reference system
JWG 2.1.1: Development of the International Terrestrial Gravity Reference Frame: 2023-2027
JWG 2.1.1: Establishment of the International Gravity Reference Frame: 2019-2023
JWG 2.1.1: Establishment of a Global Absolute Gravity Reference System: 2015-2019
JWG 2.2: Absolute Gravimetry and Absolute Gravity Reference System: 2011-2015
Webmeeting 17. February 2026: Presentation
IAG 2025 Rimini, Italy, 3. September 2025: Minutes | Presentation
GGHS 2024 Thessaloniki, Greece, 5. September 2024: Minutes | Presentation
IUGG 2023 Berlin, Germany, 14. July 2023: Presentation
Web-Meeting 11. May 2023: Presentation
Web-Meeting 22. February 2023: Minutes Presentation
Name and Acronym 25. February 2022: Presentation (IAG EC) | Discussion
Web-Meeting 18. January 2022: Presentation
Web-Meeting 20. October 2021: Minutes | Presentation
Web-Meeting 17. March 2021: Minutes | Presentation
EGU General Assembly in Vienna, Austria, 10. April 2019: Minutes | Presentation
GGHS 2, Copenhagen, Denmark, 20 September 2018: Minutes | Presentation
EGU General Assembly in Vienna, Austria, 11. April 2018: Minutes | Presentation
EGU General Assembly in Vienna, Austria 27. April 2017: Minutes | Presentation
GGHS Thessaloniki, Greece, 20. September 2016: Minutes | Presentation
Vienna, Austria, 14‐15 February, 2012: Minutes
St. Petersburg, Russia, 23.06.2010: Minutes
Chania, Greece, 24. June 2008: Circular | Minutes | Presentation