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BEGIN:VEVENT
DTSTART;VALUE=DATE:20250713
DTEND;VALUE=DATE:20250719
DTSTAMP:20260404T190451
CREATED:20250305T124923Z
LAST-MODIFIED:20250801T084718Z
UID:25832-1752364800-1752883199@geodesy.science
SUMMARY:1st GGOS IberAtlantic Summer School
DESCRIPTION:Location: Yebes Observatory\, Cerro de la Palera\, s/n\, 19141 Yebes\, Guadalajara\, Spain\nOrganizers: GGOS IA\, IGN\, Yebes Observatory\, RAEGE-Az\nSponsors: IGN Spain\, RAEGE-Az\, ROA\nParteners: National Geographic Institute of Spain (IGN Spain)\, Yebes Observatory\, RAEGE-Az\, Royal Observatory of Spanish Navy (ROA)\, Directorate-General for the Territory of Portugal (DGT)\, College of Geographic Engineering of the Order of Engineers of Portugal\, University of Alicante\, University of Porto\n\n\n\n\n\n\nThe Global Geodetic Observing System (GGOS) is an international initiative led by the International Association of Geodesy (IAG). By integrating geodetic observations from around the world\, GGOS enables the monitoring of Earth’s shape\, gravity field\, and rotation. This system is fundamental for advancing scientific research\, supporting navigation\, and enhancing disaster management capabilities (more info in https://ggos.org/) \nWithin the GGOS framework\, the GGOS IberAtlantic (GGOS IA) operates as a regional node\, concentrating on geodetic activities and infrastructure in the Iberian Peninsula and the Atlantic region. GGOS IA not only fosters collaboration among geodetic institutions but also drives scientific advancements and technological development tailored to the region’s unique geophysical characteristics (more info in ggos-iberatlantic) \nComplementing this effort is the RAEGE (Red Atlântica de Estações Geodinâmicas e Espaciais) project\, which establishes a cutting-edge network of geodetic and space observatories across the Azores\, Canary Islands\, and Iberian Peninsula. RAEGE supports geodetic and astronomical research while bolstering Europe’s global geodetic infrastructure\, directly contributing to the goals of both GGOS and GGOS IA (more info in https://raege.eu/) \nThe 1st GGOS IA Summer School offers a unique educational opportunity focused on GGOS-related topics. Over five days\, participants will engage in theoretical and practical sessions covering techniques such as VLBI\, GNSS\, SLR\, DORIS\, Gravimetry\, and Local Tie measurements. The event will showcase the RAEGE project and provide hands-on exposure to operations in fundamental geodetic stations worldwide\, including data post-processing and analysis. Additionally\, the program fosters networking not only with peers who share similar academic interests but also with experienced professionals\, providing valuable insights into real-world applications and expertise in geodetic sciences. \nMore Info: https://ggos.org/about/org/affiliates/ggos-iberatlantic/1st-ggos-ia-summer-school/ \n 
URL:https://geodesy.science/event/1st-ggos-ia-summer-school/
LOCATION:Yebes Observatory\, Cerro de la Palera\, s/n\, Yebes\, Guadalajara\, 19141\, Spain
CATEGORIES:ECS,GGOS,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/LogoSummerSchool_V002-2-180x180-1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250804
DTEND;VALUE=DATE:20250810
DTSTAMP:20260404T190451
CREATED:20241217T091405Z
LAST-MODIFIED:20250305T080450Z
UID:25560-1754265600-1754783999@geodesy.science
SUMMARY:IAU Symposium 401: Advancing Reference Systems\, Ephemeris\, and Standards
DESCRIPTION:It is our pleasure to announce that the International Astronomical Union (IAU) Symposium\n“Advancing Reference Systems\, Ephemeris\, and Standards: from the Earth and the Moon\nto Solar System Bodies” (IAUS 401) will be held from August 4 to 9\, 2025\, at the National\nUniversity of La Plata (UNLP)\, La Plata (Argentina). \nReference systems and their standardization are of paramount importance to many fields\nof astronomy. Some examples are the reduction of ground-based observations\, space\nastrometry\, astrophysics missions\, and space missions to solar system planetary bodies\nand beyond. The concept of a reference system and its realization requires the\nconvergence of reference frames\, ephemeris\, and time scales to be developed respecting\nassociated standards\, thus fulfilling one of the IAU strategic goals as the provider of\nastronomical standards and their use.\nThe IAUS 401 will provide a forum to discuss the latest results and prospects in these\nfields and thus facilitate the coordination of common standards across agencies and\norganizations. \nThe IAUS 401 is structured in six key topics:\n1.- Earth rotation models and Earth Orientation Parameters (EOP)\n2.- Celestial and terrestrial reference systems/frames\n3.- Reference systems/frames for the Moon and other solar system bodies\n4.- Time scales and time metrology\n5.- Ephemerides of solar system objects\n6.- Astronomical standards \nThe IAUS 401 registration\, abstract submission\, and IAU travel grant applications are\nalready open. The symposium will be in a hybrid format to welcome in-person and online\nparticipation. \nFor additional information and contact details\, please refer to IAUS 401 website:\nhttps://iaus401.fcaglp.unlp.edu.ar/ \nWe are looking forward to seeing you in La Plata!\nSincerely\, \nAlberto Escapa and Laura I. Fernández\,\nOn behalf of the SOC and the LOC
URL:https://geodesy.science/event/iau-symposium-401/
LOCATION:La Plata\, AR\, La Plata\, Argentina
CATEGORIES:IAU,🌐 Other
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/iau.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250806
DTEND;VALUE=DATE:20250809
DTSTAMP:20260404T190451
CREATED:20250423T101603Z
LAST-MODIFIED:20250423T101603Z
UID:27269-1754438400-1754697599@geodesy.science
SUMMARY:15th Session of the UN Committee of Experts on Global Geospatial Information Management (UN-GGIM)
DESCRIPTION:
URL:https://geodesy.science/event/15th-session-of-the-un-committee-of-experts-on-global-geospatial-information-management-un-ggim/
LOCATION:UN New York\, New York City\, USA
CATEGORIES:UN (United Nations)
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/un-ggim_logo_orig.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250826
DTEND;VALUE=DATE:20250829
DTSTAMP:20260404T190451
CREATED:20250401T102318Z
LAST-MODIFIED:20250801T084609Z
UID:26549-1756166400-1756425599@geodesy.science
SUMMARY:Summer School on "Satellite-based Hydrological Data Assimilation"
DESCRIPTION:We are thrilled to announce the upcoming Summer School on “Satellite-based Hydrological Data Assimilation”\, specifically designed for early career scientists (MSc\, PhD\, and Postdoctoral researchers). This exciting event will be hosted by the Geodesy Group at Aalborg University\, Denmark\, from August 26th to 28th\, 2025. \nWhy Attend? Dive into advanced techniques and tackle open challenges in measuring\, modeling\, and predicting water cycle variability. Learn how to leverage Satellite Gravity (GRACE/GRACE-FO)\, Satellite Altimetry (Sentinel and SWOT)\, and Soil Remote Sensing (e.g.\, SMOS and SMAP) to enhance large-scale hydrological models through Data Assimilation. Participants will gain hands-on experience with ensemble-based sequential Data Assimilation techniques\, and merging satellite data with models. \nWhat to Expect? \n\nInteractive Learning: Engage in practical exercises using Matlab/Octave and Python.\nHands-on Activities: Explore the data assimilation package (PyGLDA) and the GRACE-FO post-processing package SaGEA through practical exercises.\nExpert Lectures: Learn from world-leading scientists\, including Dr. Henrik Madsen (DHI)\, Professor Peter Bauer-Gottwein (University of Copenhagen)\, Professor Petra Döll (University of Frankfurt)\, Professor Jürgen Kusche (University of Bonn)\, Professor Gabriëlle De Lannoy (KU Leuven)\, Dr. Anke Fluhrer (German Aerospace Center\, DLR)\, Dr. Guillaume Rmillien (French National Centre for Scientific Research\, CNRS)\, Professor Mohammad Shamsudduha (University College London)\, and Professor Maike Schumacher (Aalborg University).\n\nRegistration Details: \n\nCost: Free registration!\nDeadline: End of April 2025\nLocation: Geodesy Group\, Aalborg University\, Aalborg\, Denmark\nTime: August 26-28\, 2025\n\nFor more information\, the program\, and the registration form\, please visit: Summer School Information https://www.plan.aau.dk/summer-school-satellite-based-hydrological-data-assimilation-e134157 \nEvent Category: igfs
URL:https://geodesy.science/event/summer-school-on-satellite-based-hydrological-data-assimilation/
LOCATION:Aalborg University\, Aalborg\, Denmark
CATEGORIES:Commission 2,ECS,IGFS,📚 Education & Training
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250901
DTEND;VALUE=DATE:20250906
DTSTAMP:20260404T190451
CREATED:20241022T041240Z
LAST-MODIFIED:20250526T041220Z
UID:25556-1756684800-1757116799@geodesy.science
SUMMARY:IAG Scientific Assembly 2025
DESCRIPTION:Join us at the IAG 2025 Scientific Assembly from 1 to 5 September 2025\, in Rimini\, Italy. \nWith the theme “Geodesy for a Changing Environment”\, the conference will explore critical topics in geodesy across the four IAG Commissions: Reference Frames\, Gravity Field\, Rotation and Geodynamics\, and Positioning and Applications. \nAdditionally\, the ggos-days-2025 will be held during this meeting. Unlike previous years\, the GGOS Days 2025 will not be held as a separate event. Instead\, it will be integrated into the IAG Scientific Assembly\, with GGOS component reports presented during the GGOS Symposium and a GGOS Governing Board meeting scheduled. ggos-days-2025 \nThis gathering provides an exceptional opportunity for the global geodetic community to collaborate on addressing the challenges posed by environmental changes and extreme events. We look forward to your contributions and to welcoming you to Rimini. \n  \n \nImportant Deadlines\n\n\n\nRegistration (Early-bird) deadline:\nMay 31\, 2025\n\n\nRegistration (regular) deadline:\nJuly 31\, 2025\n\n\nRegistration (late and on-site):\nAugust / September 2025\n\n\nAbstract submission deadline:\nMarch 15\, 2025\n\n\nAcceptance of abstracts:\nend of April 2025\n\n\n\nMore Information\neventi.unibo.it/iag2025
URL:https://geodesy.science/event/iag-scientific-assembly-2025/
LOCATION:Rimini\, IT\, Rimini\, Italy
CATEGORIES:IAG
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/654aaf15ceb2a.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250903
DTEND;VALUE=DATE:20250906
DTSTAMP:20260404T190451
CREATED:20241022T040031Z
LAST-MODIFIED:20260210T071535Z
UID:25555-1756857600-1757116799@geodesy.science
SUMMARY:GGOS Days 2025 | GGOS Governing Board Meeting | GGOS Science Panel Meeting
DESCRIPTION:The annual business meeting of GGOS\, known as GGOS Days\, was integrated in 2025 with the IAG Scientific Assembly 2025. GGOS reports were given during the GGOS-related oral and poster sessions and at the GGOS Governing Board and Science Panel meeting: \nGGOS Days 2025 | Oral & Poster Sessions\n\nDate: September 3-5\, 2025 (in-person only)\n👉 GGOS Days 2025 – Handbook [PDF]\n👉 GGOS Days 2025 – Report [PDF] (https://doi.org/10.5281/zenodo.17512594)\n👉 Presentation slides & Posters [PDF – at Zenodo]\n\nGGOS Governing Board & Science Panel Meeting\nA joint meeting of the GGOS Governing Board and the GGOS Science Panel took place\, to present progress related to the GGOS Implementation Plan and discuss key issues for its continuation. Participation in this meeting was by invitation only. \n\nDate/Time: Thursday\, September 4\, 2025 | 18:00-20:00 \n👉 Agenda [PDF]\n\n 
URL:https://geodesy.science/event/ggos-days-2025/
LOCATION:Rimini\, Italy\, Via della Fiera\, 23\, Rimini\, Rimini\, 47923\, Italy
CATEGORIES:GGOS
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/ggos_days_conference.png
ORGANIZER;CN="GGOS Coordinating Office":MAILTO:co@ggos.org
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250915
DTEND;VALUE=DATE:20250920
DTSTAMP:20260404T190451
CREATED:20250423T102548Z
LAST-MODIFIED:20250801T084527Z
UID:27274-1757894400-1758326399@geodesy.science
SUMMARY:JIVE VLBI School (JVS 2025)
DESCRIPTION:We are pleased to announce that the JIVE VLBI School (JVS 2025) will take place during the week of 15-19 September 2025. \nThe school will be held simultaneously at the Joint Institute for VLBI ERIC (JIVE) in Dwingeloo\, the Netherlands\, and the University of Pretoria\, South Africa. The University of Pretoria will serve as a satellite hub for the school\, with limited participation. We will hold common lectures (in-person and streamed from both venues) and parallel in-person tutorial sessions. \nJVS 2025 will train participants in data processing and imaging of very long baseline interferometry (VLBI) observations. The school will cover lectures ranging from the basics of radio interferometry in general to VLBI in particular. There will be extensive hands-on sessions to process and analyze VLBI data\, with a focus on observations from the European VLBI Network (EVN). A limited number of seats will be available at both locations. \nFurther details\, including registration information and a complete agenda\, will follow in early 2025. For now\, please mark the dates of the school on your calendar! \nContact us at jvs@jive.eu for further information and visit jive.eu/jvs2025. \nWe look forward to welcoming you to the Netherlands or Pretoria in September 2025! \nEvent Category: ivs
URL:https://geodesy.science/event/jive-vlbi-school-jvs-2025/
LOCATION:Joint Institute for VLBI ERIC (JIVE) & University of Pretoria\, Dwingeloo\, Netherlands
CATEGORIES:ECS,IVS,📚 Education & Training
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/JIVE_VLBI_SCHOOL1-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250929
DTEND;VALUE=DATE:20251004
DTSTAMP:20260404T190451
CREATED:20250915T140010Z
LAST-MODIFIED:20251001T114115Z
UID:29440-1759104000-1759535999@geodesy.science
SUMMARY:GRACE Hackweek 5
DESCRIPTION:An online school on time-variable gravity from GRACE and GRACE-FO satellite missions\nSatellite gravimetry has become an indispensible tool for studying the earth system. The satellite missions CHAMP\, GRACE/GRACE-FO and GOCE along with Satellite Laser Ranging have demonstrated the utility of time-variable gravity data in understanding the mass changes and their transport within and between the hydropshere\, cryosphere\, atmosphere\, oceans and the solid earth. \nThe challenging aspects of satellite gravimetry are the recovery of time-variable gravity from observations due to the low signal- to-noise ratio\, and the use of time-variable gravity data by non- geodesists. It is our aim in this online school to give an idea of the time variable gravity field recovery process from satellite gravimetry missions\, and also to help non-geodesists to get to grips with handling time-variable gravity data from GRACE/GRACE-FO. \nThe online school is open to everyone interested in using time- variable gravity for their research. Certificates will be issued to participants who complete all the labs. We look forward to your participation and a fruitful online school. The last date of application is September 19\, 2025 (UTC). \nRegistration: https://forms.office.com/r/WzP7GdBbwk \nMore Info: GRACE Hackweek 5 – Program \n  \nOrganizing Committee: \nProf. Balaji Devaraju (IIT Kanpur\, India); Prof. Nico Sneeuw (Uni. Stuttgart\, Germany); Prof. Matthias Weigelt (Leibniz Uni. Hannover\, Germany)
URL:https://geodesy.science/event/grace-hackweek-5/
CATEGORIES:Commission 2,ECS,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/GRACE_NASA__1__Copyright-aei.mpg.de_2025-09-15.png
ORGANIZER;CN="Balaji Devaraju":MAILTO:dbalaji@iitk.ac.in
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251001
DTEND;VALUE=DATE:20251003
DTSTAMP:20260404T190451
CREATED:20250825T103401Z
LAST-MODIFIED:20250825T105250Z
UID:29160-1759276800-1759449599@geodesy.science
SUMMARY:South African National Geodesy Workshop
DESCRIPTION:Towards a National Geodesy Working Group for South Africa  \nGeodesy — the science of measuring the Earth’s shape\, orientation\, gravity field\, and changes over time — is the foundation of modern mapping\, positioning\, land administration\, infrastructure\, and climate monitoring. \nSouth Africa has a proud history in terrestrial and space geodesy\, from early triangulation networks to today’s NRF Space Geodesy facilities\, TrigNet GNSS stations\, tide gauges\, and participation in global collaborations. Yet\, our efforts remain fragmented across institutions\, with limited coordination. \nIn 2015\, the United Nations adopted Resolution A/RES/69/266 on the Global Geodetic Reference Frame for Sustainable Development (GGRF)\, calling on all countries to strengthen geodetic infrastructure\, skills\, and governance. South Africa must respond by aligning nationally and globally. \nTo this end\, a National Geodesy Workshop will be convened to: \n\nBring together key stakeholders in geodesy.\nStrengthen coordination of infrastructure\, data\, services\, and skills.\nAlign with the UN-GGRF agenda.\nEstablish a National Geodesy Working Group as a formal coordination mechanism.\n\nThis is an exciting step towards ensuring that South Africa continues to play a leading role in geodesy\, contributing both to national development and the global community.
URL:https://geodesy.science/event/south-african-national-geodesy-workshop/
LOCATION:South African Astronomical Observatory (SAAO) Auditorium\, SAAO\, 1 Observatory Rd\, Observatory\, Cape Town\, Cape Town\, 7925\, South Africa
CATEGORIES:GGOS,UN (United Nations)
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/SAGWG_logo_Copyright-AlethadeWittDSTI_2025-08-22-scaled.png
ORGANIZER;CN="DSTI":MAILTO:aletha.dewitt@dsti.gov.za
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251007
DTEND;VALUE=DATE:20251010
DTSTAMP:20260404T190451
CREATED:20250423T103118Z
LAST-MODIFIED:20250423T103118Z
UID:27280-1759795200-1760054399@geodesy.science
SUMMARY:GRACE-FO Science Team Meeting 2025
DESCRIPTION:The 2025 GRACE-FO Science Team Meeting will take place from Oct 7-9\, 2025\, in Boulder\, CO (USA)\, at the University of Colorado\, Boulder\, in the Village Center! This meeting will be held in hybrid mode (i.e.\, in-person with live-remote options). \nEvent Category: igfs
URL:https://geodesy.science/event/grace-fo-science-team-meeting-2025/
LOCATION:University of Colorado\, Boulder\, Boulder\, USA
CATEGORIES:Commission 2,IGFS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/event-meeting_AdobeStock_4746141881-scaled.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251013
DTEND;VALUE=DATE:20251017
DTSTAMP:20260404T190451
CREATED:20250305T103408Z
LAST-MODIFIED:20250305T103408Z
UID:25797-1760313600-1760659199@geodesy.science
SUMMARY:The Arab Conference on Astronomy and Geophysics (ACAG 9)
DESCRIPTION:Event Category: other
URL:https://geodesy.science/event/the-arab-conference-on-astronomy-and-geophysics-acag-9/
LOCATION:Cairo\, Egypt\, Cairo\, Egypt
CATEGORIES:🌐 Other
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/ACAG-9.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251017
DTEND;VALUE=DATE:20251019
DTSTAMP:20260404T190451
CREATED:20250423T103604Z
LAST-MODIFIED:20250423T103632Z
UID:27285-1760659200-1760831999@geodesy.science
SUMMARY:34th CODATA General Assembly
DESCRIPTION:The 34th CODATA General Assembly will take place on 17-18 October 2025 in Brisbane\, Australia\, and online. See the letter from CODATA President convening the General Assembly on the dates following the International Data Week 2025.
URL:https://geodesy.science/event/34th-codata-general-assembly/
LOCATION:Australia\, Brisbane\, Brisbane\, Australia
CATEGORIES:🌐 Other
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/CDT_logo-sub_blue@3x-100-copy-300x132-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251021
DTEND;VALUE=DATE:20251026
DTSTAMP:20260404T190451
CREATED:20250423T104010Z
LAST-MODIFIED:20250820T083009Z
UID:27292-1761004800-1761436799@geodesy.science
SUMMARY:10th International VLBI Technology Workshop (IVTW)
DESCRIPTION:The 10th International VLBI Technology Workshop (IVTW)  will take place October 21-25\, 2025. The meeting will be hosted by Chalmers University of Technology\, Onsala Space Observatory\, in Gothenburg\, Sweden. \nThe scope of the workshop is to encompass all areas of VLBI hardware and software development and techniques on station updates\, frontends\, backends\, recorders\, correlation\, image processing\, potential space VLBI missions and RFI monitoring\, mitigation and other strategies in today’s rapidly changing environment. \nLearn more…
URL:https://geodesy.science/event/10th-international-vlbi-technology-workshop-ivtw/
LOCATION:Gothenburg\, Sweden\, Gothenburg\, Sweden
CATEGORIES:IVS
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/vlbi_workshop_ivtw_oso_langsmal_foto_r_hammargren_2020_300dpi_full-1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251026
DTEND;VALUE=DATE:20251029
DTSTAMP:20260404T190451
CREATED:20250331T104616Z
LAST-MODIFIED:20250801T084411Z
UID:26542-1761436800-1761695999@geodesy.science
SUMMARY:5th IVS Training School on VLBI for Geodesy and Astrometry
DESCRIPTION:The aim of this training school is to prepare for the next generation of VLBI\, both in terms of technical development and knowledge transfer between generations of researchers. The new VLBI Global Observing System (VGOS) is being installed worldwide and continues to develop.  VGOS promises significant improvement in the accuracy of VLBI results.  Thus\, VGOS will be of great importance for geosciences and global change research as part of the Global Geodetic Observing System (GGOS). \nThe successful development of VLBI technology in the future requires training and educating the young generation of scientists and their familiarization with all aspects of VLBI technology\, starting with VLBI station instrumentation receiving and converting the radio signal\, data processing and analysis and obtaining the final results\, such as Terrestrial and Celestial Reference Frames and Earth Orientation Parameters. \nThe IVS Training School is organized by the IVS Committee on Education and Training (IVS CTE)\nDetails about the school will be made available in due time on the website:\nhttps://www.maanmittauslaitos.fi/en/about-nls/organisation/cooperation-groups/ivs-committee-education-and-training/5th-ivs-training\nFor further information contact Nataliya Zubko (firstname.lastname@nls.fi) \nEvent Category: ivs
URL:https://geodesy.science/event/5th-ivs-training-school-on-vlbi-for-geodesy-and-astrometry/
LOCATION:Sweden\, Gothenburg\, Gothenburg\, Sweden
CATEGORIES:ECS,IVS,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/5th_IVS_VLBI_school.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251027
DTEND;VALUE=DATE:20251102
DTSTAMP:20260404T190451
CREATED:20250910T045813Z
LAST-MODIFIED:20250910T045813Z
UID:29387-1761523200-1762041599@geodesy.science
SUMMARY:XVI SIRGAS School “VLBI and SLR Data Processing”
DESCRIPTION:The XVI SIRGAS School will be held in the beautiful city of San Juan\, Argentina\, with the aim of training professionals in the field of geodesy through the processing of VLBI (Very Long Baseline Interferometry) and SLR (Satellite Laser Ranging) data\, key techniques for the definition of global reference frames. \nThe purpose of this course is to provide the theoretical concepts and practical tools necessary for the analysis and processing of VLBI and SLR techniques\, delving into their application in the definition and maintenance of geodetic reference frames. \n 
URL:https://geodesy.science/event/xvi-sirgas-school-vlbi-slr/
LOCATION:Facultad de Ingeniería – Universidad Nacional de San Juan\, Av. Libertador Gral. San Martín 1109\, J5400ARL San Juan\, Argentina\, San Juan\, Argentina
CATEGORIES:Commission 1,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/INGLES-1-1536x1536_Copyright-SIRGAS_2025-09-08.png
ORGANIZER;CN="SIRGAS":MAILTO:sirgasipgh@gmail.com
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251103
DTEND;VALUE=DATE:20251106
DTSTAMP:20260404T190451
CREATED:20250909T050507Z
LAST-MODIFIED:20250909T050718Z
UID:29339-1762128000-1762387199@geodesy.science
SUMMARY:IDS DORIS School | DORIS Days 2025
DESCRIPTION:The IDS is organizing a new edition of the “DORIS Days” designed to offer both a foundational and hands-on experience with DORIS and the IDS community\, tailored especially to early-career researchers and students. \nMonday\, 3 November (second half of UTC day) \nIntroductory and advanced presentations on the DORIS system\, IDS\, precision applications\, and associated tools and products. \nVenue: online only \nWednesday\, 5 November (full day\, hybrid with in-person participation strongly encouraged) \nIntroduction to handling and processing DORIS data\, with theoretical lectures and guided practical sessions using Jupyter Notebook. \nVenue: National Technical University of Athens\, Greece – Zografos Campus\, School of Rural Surveying & Geoinformatics Engineering\, Labadarion Building 9 Heroon Polytechniou Street\, 15780 Athens \nLearn More: https://ids-doris.org/ids/meetings/ids-meetings.html%20 \n 
URL:https://geodesy.science/event/ids-doris-days-school-2025/
LOCATION:National Technical University of Athens\, Athens\, Greece\, Zografos Campus\, School of Rural Surveying & Geoinformatics Engineering\, Labadarion Building 9 Heroon Polytechniou Street\, Athens\, 15780\, Greece
CATEGORIES:IDS,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/logo_DD_2025_Copyright-IDS_2025-09-08.png
ORGANIZER;CN="IDS Central Bureau":MAILTO:ids.central.bureau@ids-doris.org
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251106
DTEND;VALUE=DATE:20251108
DTSTAMP:20260404T190451
CREATED:20250423T104359Z
LAST-MODIFIED:20250909T080211Z
UID:27297-1762387200-1762559999@geodesy.science
SUMMARY:DORIS Analysis Working Group Meeting
DESCRIPTION:Dates: November 6 (full day) & 7 (morning)\, 2025\nLocal host: Maria Tsakiri (NTUA)\nMeeting location: National Technical University of Athens\, Greece – Patision Campus 28th Oktovriou (Patision) Avenue No 42\, 10682 Athens\nHybrid meeting\nOther related event (invitation-only): Governing Board hybrid meeting\, Friday November 7 (TBD)\n\nMore information: https://ids-doris.org/ids/meetings/ids-meetings.html \n 
URL:https://geodesy.science/event/doris-analysis-working-group-meeting/
LOCATION:Athens\, Greece\, Athens\, Greece
CATEGORIES:IDS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/IDS-event.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251106T170000
DTEND;TZID=Europe/Berlin:20251106T180000
DTSTAMP:20260404T190451
CREATED:20251013T094703Z
LAST-MODIFIED:20251022T060719Z
UID:30586-1762448400-1762452000@geodesy.science
SUMMARY:"Talks on GIA" seminar
DESCRIPTION:“Talks on GIA” seminar – Constraining GIA where the mantle is heterogeneous AND Community Priorities for GNSS Measurements\nWe will have two presentations. \n\nErica Lucas (University of California\, Santa Cruz\, USA) will present “Constraining Glacial Isostatic Adjustment where the mantle is heterogeneous”.\nTerry Wilson (Ohio State University\, Columbus\, USA) will present “Community Priorities for GNSS Measurements to Constrain GIA – Results of a Survey”\n\n“Constraining Glacial Isostatic Adjustment where the mantle is heterogeneous”\nTo date\, investigations of the impact of 3-D Earth structure on GIA have adopted solid Earth viscoelastic models based on global- and continental-scale seismic imaging\, with variability at spatial length scales >150 km. However\, regional body-wave tomography shows mantle structure variability at smaller length scales (∼50–100 km) in central West Antarctica. We investigate the effects of incorporating smaller-scale lateral variability in upper-mantle viscosity into 3-D GIA simulations\, finding that upper-mantle structure at the glacial drainage basin scale is found to impact GIA model predictions for modern and projected ice mass changes. Differences between simulations adopting upper-mantle viscosity structure inferred from regional- versus coarser continental-scale seismic imaging are large enough to impact the interpretation of crustal motion observations from GNSS and reach up to ∼15 % of the total predicted sea level change during the instrumental record. \n“Community Priorities for GNSS Measurements to Constrain GIA – Results of a Survey”\nA survey in 2025 revealed community views on the most pressing science questions in Antarctica that can be addressed using GNSS measurements and on the regions in Antarctica where in situ GNSS observations will be most helpful in answering these science questions. A summary of survey results will be presented for discussion.
URL:https://geodesy.science/event/talks-on-gia-seminar/
CATEGORIES:Commission 3,📚 Education & Training
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251205T150000
DTEND;TZID=UTC:20251205T160000
DTSTAMP:20260404T190451
CREATED:20251114T090917Z
LAST-MODIFIED:20251114T090917Z
UID:31775-1764946800-1764950400@geodesy.science
SUMMARY:“Talks on GIA” seminar
DESCRIPTION:Helio Guerra Neto and Jeff Freymueller from Michigan State University\, East Lansing\, USA\, will present \n“GIA in the Great Lakes Basin: A Geodetic Perspective on Vertical Motion and Hydrological Loading” \nVertical crustal motion in the Great Lakes Basin\, North America\, results from a combination of ongoing Glacial Isostatic Adjustment (GIA) and environmental and hydrological loadings. The hinge line for present-day vertical motion from GIA passes through the region\, and the last 15 years have featured significant rise and then fall of the water levels in the Great Lakes. The region is also densely instrumented with continuous GNSS sites\, due to extensive networks operated by US states. We are involved in a project with the goal of constraining groundwater changes in the region\, and to make those measurements we need to remove the GIA signal accurately. In this presentation\, we will discuss recent advances in our project\, using GNSS time series to quantify vertical land motion across the basin\, emphasizing the challenges of distinguishing long-term uplift signals (GIA) from the elastic responses to local mass variations.\nWe identify three distinct periods with very different patterns of local mass variations. Before 2012\, the water levels in the Great Lakes were stable\, and GRACE data suggest minimal total water changes across the region; this time interval should thus feature motions entirely due to GIA. From 2012-2019\, water levels in the Lakes rose to record highs\, and since 2020 the water levels have been falling at a similar rate. We thus examine the velocities in map view and along profiles roughly normal to the ice front.\nWe have compared the predictions of a large number of GIA models (mainly variations in the Earth models) with the pre-2012 observations\, which should be due entirely to GIA. We find that none of the GIA models adequately predict the observed data\, and models fail systematically: they all predict the hinge line to be located too far south. When viewed along a profile normal to the ice front\, our data look very much like a GIA model curve. We thus experimented with an empirical correction in which we shift the GIA model predictions laterally and identify a suite of models that predict profiles with the same shape as the data. The model predictions need to be shifted northward to northeastward\, which would likely mean that an ice model with less ice near the southern ice front in the Great Lakes region would fit the data better.
URL:https://geodesy.science/event/talks-on-gia-seminar-2/
CATEGORIES:Commission 3
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="IAG/IACS subcommission 3.4 %E2%80%9CCryospheric Deformation%E2%80%9D":MAILTO:matthias.willen@tu-dresden.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251215
DTEND;VALUE=DATE:20251220
DTSTAMP:20260404T190451
CREATED:20241022T042417Z
LAST-MODIFIED:20250305T080548Z
UID:25558-1765756800-1766188799@geodesy.science
SUMMARY:AGU25 - GGOS Session
DESCRIPTION:  \n\nThe AGU Annual Meeting 2025 brings together geoscientists from all over the world to one meeting covering all disciplines of the Earth\, planetary\, and space sciences. \nGGOS is planning to have it’s own session. More information will follow…
URL:https://geodesy.science/event/agu-2025-ggos/
LOCATION:New Orleans\, USA\, New Orleans\, United States
CATEGORIES:AGU,GGOS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_2506667411-scaled-1.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20251215
DTEND;VALUE=DATE:20251220
DTSTAMP:20260404T190451
CREATED:20250305T082811Z
LAST-MODIFIED:20250305T082811Z
UID:25729-1765756800-1766188799@geodesy.science
SUMMARY:AGU Annual Meeting 2025
DESCRIPTION:Event Category: agu
URL:https://geodesy.science/event/agu-annual-meeting-2025/
LOCATION:New Orleans\, USA\, New Orleans\, United States
CATEGORIES:AGU
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/Logo_AGU.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260127T140000
DTEND;TZID=Europe/Berlin:20260127T150000
DTSTAMP:20260404T190451
CREATED:20260107T082728Z
LAST-MODIFIED:20260107T082728Z
UID:32566-1769522400-1769526000@geodesy.science
SUMMARY:Webinar - AI For GNSS Remote Sensing
DESCRIPTION:This online meeting of the IAG GGOS Joint Study Group on AI for GNSS Remote Sensing (open to non-members) brings together researchers and practitioners to discuss recent advances in artificial intelligence and machine learning applied to GNSS-based Earth observation. The program covers AI-driven approaches for atmospheric and ionospheric sensing\, tropospheric modeling\, uncertainty quantification\, and GNSS reflectometry. \n\n\nAgenda: \n\n14:00–14:15 — Nikolina Govedarica (IBM Corporation)\nAgentic AI – Action-Driven Intelligence\n14:15–14:30 — Cuixian Lu (Wuhan University)\nGNSS Atmospheric Sounding Using Deep Learning\n14:30–14:45 — Peng Yuan (GFZ)\nAI-Enhanced Vertical Modeling of Tropospheric Products\n14:45–15:00 — Saeid Haji-Aghajany (Wrocław University of Environmental and Life Sciences)\nRemote Sensing Techniques for AI-Based Tropospheric Analysis and Weather Forecasting\n15:00–15:15 — Randa Natras (DLR)\nUncertainty Quantification in ML-Based Models Applied to Ionosphere Forecasting\n15:15–15:30 — Lei Liu (University of Michigan\, Ann Arbor)\nIonosphere Remote Sensing Using GNSS Measurements\n15:30–15:45 — Hamed Izadgoshasb (Sapienza University of Rome / GFZ)\nExplainable CYGNSSnet for Global GNSS-Reflectometry Soil Moisture\n15:45–15:50 — Wrap-up and final discussions
URL:https://geodesy.science/event/webinar-ai-gnss-remote-sensing/
CATEGORIES:GGOS
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/Presentation1_Copyright-MiladAsgarimehr_2026-01-06_559c78.png
ORGANIZER;CN="GFZ Helmholtz Centre for Geosciences":MAILTO:milad@gfz.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20260203T170000
DTEND;TZID=Europe/Stockholm:20260203T180000
DTSTAMP:20260404T190451
CREATED:20251210T083323Z
LAST-MODIFIED:20251210T083323Z
UID:32255-1770138000-1770141600@geodesy.science
SUMMARY:“Talks on GIA” seminar 3
DESCRIPTION:Mirjam Bilker-Koivula (Finnish Geospatial Research Institute) and Holger Steffen (Lantmäteriet\, Sweden)\, will present \n“The Whys and Hows of Dealing with Glacial Isostatic Adjustment in a Mapping Authority” \nGlacial isostatic adjustment (GIA) affects among others vertical datums\, sea-level measurements\, GNSS heights\, and crustal motion models. Hence\, it creates technical and practical challenges for mapping agencies. They have to address them in their daily work by updating geodetic reference frames\, modeling vertical land motion\, adjusting elevation datasets\, communicating changes to users\, maintaining long-term stability of coordinates and more. We will present some examples how two authorities\, Lantmäteriet in Sweden and the Finnish Geospatial Research Institute (FGI)\, handle GIA. We will focus on deformation and gravity change\, but also provide snapshots of Lantmäteriet’s communication efforts and FGI’s GIA-related investigations in Antarctica.
URL:https://geodesy.science/event/talks-on-gia-seminar-3/
CATEGORIES:Commission 3
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="IAG/IACS subcommission 3.4 %E2%80%9CCryospheric Deformation%E2%80%9D":MAILTO:matthias.willen@tu-dresden.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260211T140000
DTEND;TZID=UTC:20260211T160000
DTSTAMP:20260404T190451
CREATED:20260114T050603Z
LAST-MODIFIED:20260114T063352Z
UID:32653-1770818400-1770825600@geodesy.science
SUMMARY:Women in scientific organizations
DESCRIPTION:An event to mark the International Day of Women and Girls in Science on 11 February 2026 the International Science Council (ISC)\, InterAcademy Partnership (IAP) and Standing Committee for Gender Equality in Science (SCGES) will host a webinar highlighting the role of women in scientific organizations\, focusing on leadership\, representation and strategies to advance gender equality across the global science system: https://council.science/events/women-in-scientific-organizations-webinar/
URL:https://geodesy.science/event/women-in-scientific-organizations/
CATEGORIES:ECS,IUGG
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/VISUAL_Women-in-science-9-690x0-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Lisbon:20260223T090000
DTEND;TZID=Europe/Lisbon:20260223T100000
DTSTAMP:20260404T190451
CREATED:20260122T085759Z
LAST-MODIFIED:20260122T085759Z
UID:32771-1771837200-1771840800@geodesy.science
SUMMARY:GNSS-EPOS Webinar\, with Dr. Marianne Métois
DESCRIPTION:We are pleased to invite the GNSS-EPOS community to the inaugural session of our 2026 webinar series\, featuring guest speaker Dr. Marianne Métois from the Laboratoire de Géologie de Lyon. \nPresentation Title:\n\n“Tracking very slow deformation of continental Europe with GNSS: challenges and perspectives” \n\nEvent Details:\n\n\nDate: Monday\, 23rd February 2026 \n\n\nTime: 10:00 – 11:00 CET \n\n\nPlatform: Microsoft Teams \n\nRegistration: CLICK FOR REGISTRATION
URL:https://geodesy.science/event/gnss-epos-webinar-with-dr-marianne-metois/
CATEGORIES:Commission 3
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/GNSS-EPOS_2026_Webinar_Copyright-EPOSTCSGNSS_2026-01-21_e34d8d.png
ORGANIZER;CN="EPOS TCS GNSS":MAILTO:communication@gnss-epos.eu
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260302
DTEND;VALUE=DATE:20260307
DTSTAMP:20260404T190451
CREATED:20250224T071838Z
LAST-MODIFIED:20250616T062856Z
UID:25563-1772409600-1772841599@geodesy.science
SUMMARY:Munich 2026 | REFAG Symposium + Unified Analysis Workshop UAW
DESCRIPTION:The Technical University of Munich (TUM) is proud to lead global geodetic research as it currently holds the presidents of Commission 1 “Reference Frames” of the International Association of Geodesy (IAG) and the IAG Global Geodetic Observing System (GGOS). In this prominent role\, TUM is excited to host two landmark events in 2026: \n\nThe IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG2026)\, 2–4 March 2026\, and\nThe joint GGOS/IERS (International Earth Rotation and Reference Systems Service) Unified Analysis Workshop (UAW2026)\, 5–6 March 2026\n\nThese events will bring together leading experts\, researchers\, and institutions to shape the future of global geodesy — right here at TUM in Munich\, Germany. \nPlease find more information here…
URL:https://geodesy.science/event/munich2026/
LOCATION:LDBV – Landesamt für Digitalisierung\, Breitband und Vermessung\, Alexandrastraße 4\, Munich\, 80538\, Germany
CATEGORIES:Commission 1,GGOS,IAG Services,IERS
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/munichArtLandscape1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260305
DTEND;VALUE=DATE:20260307
DTSTAMP:20260404T190451
CREATED:20260325T065808Z
LAST-MODIFIED:20260331T071244Z
UID:34819-1772668800-1772841599@geodesy.science
SUMMARY:UAW2026: GGOS/IERS Unified Analysis Workshop 2026
DESCRIPTION:  \nUnder the umbrella of the International Association of Geodesy (IAG)\, the IAG’s Global Geodetic Observing System (GGOS) and the International Earth Rotation and Reference Systems Service (IERS) periodically hold unified analysis workshops to discuss current issues in geodetic data analysis and the determination of geodetic reference frames\, as well as the provision of reliable geodetic products for use in other geosciences and by society. In 2026\, the Unified Analysis Workshop (UAW) was hosted by the Technical University of Munich (TUM) in Munich\, Germany\, on 5th and 6th March 2026. The presentations and outcomes of the discussions are presented below according to the different UAW sessions. \n  \nWorkshop objectives\, format and attendees\n\nUAW2026 Pre-meeting reading materials\n\n  \nIERS Conventions updates\n\nIERS Conventions v2.0.0  | Sharyl Byran\, Nick Stamatakos\, Michael Efroimsky\, Patrick Charlot\, Alet de Witt\, Jean Souchay\, Frank Lemoine\, Dennis McCarthy\, José Ferrandiz\, John Ries\, Srinivas Bettadpur\, Sigrid Böhm\, Johannes Böhm\,\nReview of Changes to be Implemented for IERS Conventions Chapter 1: General Definitions and Numerical Standards | Nick Stamatakos\, Detlef Angermann\, Dennis McCarthy\nThe IERS Rapid Service / Prediction Center: Mission\, Challenges\, and Developments | Maria Davis\, Sharyl Byram\nDiscussion on IERS conventions  | Christian Bizouard\n\nOutcomes | IERS Conventions updates \n  \nWhat do we need from the next generation of geophysical models\, and their future use in geodetic data analysis and reference frame?\n\nWhat do we need from the next generation of geophysical models\, and their future use in geodetic data analysis and reference frame? | Jeff Freymueller\nTypical “environmental” corrections in geodesy processing | Jean-Paul Boy\nBackground models in Least Squares Adjustment (LSA) | Torsten Mayer-Gürr\nConsistency of pole tide and GIA corrections | A. Couhert\, M. Rousselet\, B. Meyssignac\n\nOutcomes | What do we need from the next generation of geophysical models\, and their future use in geodetic data analysis and reference frame? \n  \nChallenges in the new ITRF operational updates\n\nChallenges in the new ITRF operational updates: Points for discussion | Zuheir Altamimi\nITRS Combination Center at IGN | Z. Altamimi\, P. Rebischung\, X. Collilieux\, L. Métivier\, J. Barnéoud\, M. de La Serve\nITRS Combination Center at DGFI-TUM | Manuela Seitz\nC04 series update in the current ITRF | Christian Bizouard\nITRF Transition for IERS Rapid Service / Prediction Center (RS/PC) |  Nick Stamatakos\, Sharyl Byram\, Maria Davis\nChallenges in the new ITRF operational updates IDS | Petr Štěpánek\, Guilhem Moreaux\, Frank G. Lemoine\nIGS contributions to ITRF-updates | Tom Herring\nILRS ASC reprocessing for ITRF2020-u2025 | Mathis Bloßfeld\nIVS perspective on ITRF updates | Benedikt Soja\, Alexander Kehm\n\nOutcomes | Challenges in the new ITRF operational updates \n  \nChallenges and opportunities in analysing Genesis data\n\nChallenges and opportunities in analyzing Genesis data | Introduction | Johannes Böhm\, Urs Hugentobler\, Susanne Glaser\, Hanane Ait-Lakbir\nJoint Pilot Projects for the Analysis of Genesis Observations | Johannes Böhm\, Urs Hugentobler\, Susanne Glaser\, Hanane Ait-Lakbir\nOrbit Combination at the Normal Equation Level | Johannes Böhm\, Urs Hugentobler\, Susanne Glaser\, Hanane Ait-Lakbir\nDiscussion\nSummary\n\nOutcomes | Challenges and opportunities in analysing Genesis data \n  \nResilience of IAG Scientific Services\n\nResilience of IAG Scientific Services | Introduction | Richard Gross\, Hansjörg Kutterer\n\nOutcomes | Resilience of IAG Scientific Services \n  \nAvailability of geodetic products for the Essential Geodetic Variables\n\nAvailability of geodetic products for the Essential Geodetic Variables | Introduction | Laura Sánchez\, Detlef Angermann\, Thomas Gruber\n\nOutcomes | Availability of geodetic products for the Essential Geodetic Variables \n  \nOpen session topic (a) Gravitational deformations of VLBI receiving units\n\nResolution on Modelling Gravity-Induced Deformations of the Radio Telescope Receiving Unit | Cornelia Eschelbach\n\nOutcomes | Resolution on Modelling Gravity-Induced Deformations of the Radio Telescope Receiving Unit \n  \nOpen session topic (b) Correlations in atmospheric parameter estimation\n\nCorrelations in Atmospheric Parameter Estimation | Introduction | Benedikt Soja\nStochastic model in VLBI work done at TU Wien | Krásná Hana\nTropospheric turbulence | Minghui Xu\n\n  \nOpen session topic (c) Increased automation in geodetic data analysis\n\nIncreased Automation in Geodetic Data Analysis | Benedikt Soja
URL:https://geodesy.science/event/unified-analysis-workshop-uaw-2026/
LOCATION:Munich\, Germany\, Munich\, Germany
CATEGORIES:GGOS,IERS
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DTSTART;TZID=Australia/Sydney:20260305T070000
DTEND;TZID=Australia/Sydney:20260305T080000
DTSTAMP:20260404T190451
CREATED:20260218T140956Z
LAST-MODIFIED:20260218T140956Z
UID:33158-1772694000-1772697600@geodesy.science
SUMMARY:Talks on GIA Seminar
DESCRIPTION:Paul Tregoning (Australian National University\, Canberra\, Australia)\, will present \n“A tool to assess the accuracy of glacial isostatic adjustment predictions of present-day crustal uplift rates” \nWhile there are many global and regional glacial isostatic adjustment (GIA) models available that can be used to compute expected present-day uplift rates of the surface of the Earth\, they do not always agree in their predictions. Obtaining accurate estimates of uncertainties in predictions is difficult due to the assumptions that must be made when constructing the GIA models\, and geodetic users often simply adopt a preferred model or assign uncertanties based on the spread of values derived from several models. Here we show that\, through a combination of gravity changes observed by GRACE/GRACE-FO and uplift observed by GNSS\, it is possible to quantify the error in uplift rates of one or more GIA models. Whilst it is not possible to repair the GIA models directly\, this tool can be used to identify regions where ice histories and/or Earth rheology parameters are deficient in the GIA models. In this talk I will give examples of locations where GIA modelling appears to be very accurate as well as indicate some locations that are clearly problematic.
URL:https://geodesy.science/event/talks-on-gia-seminar-4/
CATEGORIES:Commission 3,IACS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="Joint IAG-IACS Commission on Cryospheric Deformation (Sub-Commission 3.4)":MAILTO:matthias.willen@tu-dresden.de
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DTSTART;VALUE=DATE:20260311
DTEND;VALUE=DATE:20260314
DTSTAMP:20260404T190451
CREATED:20260210T100813Z
LAST-MODIFIED:20260210T100813Z
UID:33052-1773187200-1773446399@geodesy.science
SUMMARY:GeodCon-26
DESCRIPTION:The National Symposium Conference on Geodesy (GeodCon-26) aims to bring together researchers\, academicians\, professionals\, policymakers\, and industry leaders to explore recent advancements in Geodetic Science and its Applications. This premier event will serve as a platform to share innovations and best practices shaping Earth observation\, positioning\, and navigation technologies. \nThe Symposium conference will highlight global and regional developments in geodesy\, focusing on reference frames\, Earth system monitoring\, satellite and ground-based observations\, and the integration of emerging tools such as AI and cloud computing in geodetic data analysis. Discussions will emphasize geodesy’s role in addressing challenges like climate change\, natural hazards\, groundwater monitoring\, and crustal deformation. \nThe technical program will include tutorials by eminent experts\, offering valuable insights and practical perspectives for students\, researchers\, and professionals. Workshops\, paper and poster sessions\, and expert panels will further promote interaction\, skill enhancement\, and collaboration among academia\, government\, and industry. \nGeodCon-26 aspires to strengthen national geodetic capacity\, foster innovation and capacity building\, and position India at the forefront of global geospatial science and earth observation. \nGeodCon-26_Brochure
URL:https://geodesy.science/event/geodcon-26/
LOCATION:Indian National Science Academy (INSA)\, New Delhi\, New Delhi\, India
CATEGORIES:IAG
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/GeodCon-26.jpg
ORGANIZER;CN="National Centre for Geodesy%2C IIT Kanpur":MAILTO:ncg@iitk.ac.in
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DTSTART;TZID=Europe/Rome:20260311T160000
DTEND;TZID=Europe/Rome:20260311T170000
DTSTAMP:20260404T190451
CREATED:20260309T125919Z
LAST-MODIFIED:20260309T125919Z
UID:34064-1773244800-1773248400@geodesy.science
SUMMARY:Tracking Mountain Aquifer using Space Geodesy
DESCRIPTION:Dear Colleagues\,\n\nWe are pleased to announce our first seminar for our series\, hosted by the International Association of Geodesy (IAG) Working Group 3.1: Hydrologic Signature in Geodetic Observations\, will be given by Matthew Swarr\, from the University of Montana.  This seminar wil be held at 11:00 EDT/ 8:00 PDT/ 16:00 CET/ 23:00 CST.\n\nJoin the webinar:  \nhttps://iu.zoom.us/j/82295302430\nMeeting ID: 822 9530 2430\n\nTitle: Tracking Mountain Aquifer Storage and Discharge Using Space Geodesy\nAbstract: Fractured bedrock underlying mountain ranges is a critical source of water for mountain and adjacent low-elevation communities and ecosystems. Despite the importance of mountain groundwater systems to water supplies of major socioeconomic regions\, quantifying storage changes within these aquifers remains a challenge. To evaluate the fate of water stored in mountain systems and the role of extreme precipitation events\, such as atmospheric rivers\, in replenishing groundwater storage\, we use high-precision Global Navigation Satellite Systems (GNSS) surface displacements to constrain changes in groundwater storage within the Sierra Nevada and Cascade mountain ranges\, two important mountainous regions of the Western United States. We find that mountain aquifers have been significantly depleted over the past two decades\, associated with recurrent severe multi-year droughts within these regions. However\, extremely wet winters\, can replenish storage by more than twice the average annual flux over relatively short periods\, driving the state of groundwater storage from historical lows to above normal conditions. Further\, we find GNSS derived groundwater storage changes are strongly correlated with observed groundwater head from wells. These findings show that periods of extreme precipitation rapidly recharge mountain aquifer systems and can offset multi-year losses. Moreover\, mountain aquifer systems can retain storage gains for several years post-event\, providing a durable source of streamflow\, agricultural\, and municipal water supply. As extreme precipitation events are predicted to become more intense and frequent in coming years\, we hypothesize that these events may help offset groundwater loss due to aridification\, sustaining ecosystems and buffering against a new\, drier climate normal. Additionally\, we provide insights on a newly developed method to constrain the hydraulic properties of mountain groundwater systems at the mountain range-scale using fluid diffusion models in combination with our GNSS-inferred estimates of groundwater storage. Our results indicate the effective hydraulic conductivity of the bedrock within the Sierra Nevada and Cascades is an order of magnitude higher than previous findings\, and we find consistency between our estimates of the average groundwater flow path length within the Sierra Nevada and Cascades and those derived from perennial and intermittent and perennial stream networks\, respectively\, indicating the Cascades to be a recharge dominated groundwater system with increased regional groundwater flow compared to the Sierra Nevada. These results further the current understanding of the storage and release properties of mountain groundwater systems as well as highlighting the use of geodetic observations in advancing groundwater hydrology.\n\n\nCarla Braitenberg and Grace Carlson\n\nGrace Carlson\nshe/ her\nDepartment of Geography\nIndiana University\n\n\nCarla Braitenberg\nDepartment of Mathematics\, Informatics and Geosciences\nUniversity of Trieste
URL:https://geodesy.science/event/tracking-mountain-aquifer-using-space-geodesy/
CATEGORIES:Commission 3
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="Commission 3- Earth Rotation and Geodynamics. WG 3.1 Hydrologic signature in geodetic observations":MAILTO:berg@units.it
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