GGOS Days 2026
GGOS is the Global Geodetic Observing System of the International Association of Geodesy (IAG). Through GGOS, the IAG provides a common framework to encourage, coordinate and facilitate Earth-monitoring efforts based on geodesy. This framework aims to integrate observations collected by different national and international organisations and to raise awareness of geodesy and its products. GGOS relies on the existing geodetic observing infrastructure and the IAG organisational structure. The IAG Commissions, Inter-Commission Committees and Projects address key scientific issues to innovate methods and technologies in the various fields of geodesy, framing the science background for GGOS. The IAG Services facilitate the global coordination of activities to collect and analyse geodetic data and to provide geodetic reference frames and other products to geodesists, researchers of other Earth sciences, national administrations, and society in general. Additional operational elements dedicated solely to GGOS issues ensure the efficient organisation of GGOS activities and address challenges that cannot be solved by individual IAG components alone.
Each year, the GGOS Executive Committee organises the GGOS Days to update the IAG and GGOS communities on recent achievements and current challenges faced by the various colleagues involved in accomplishing the GGOS strategic goals. On this occasion, thanks to the kind invitation of Lantmäteriet, the Swedish Mapping, Cadastral and Land Registration Authority, the GGOS Days 2026 will be held as a hybrid meeting in Gävle, Sweden, from October 5 to 7, 2026.
In the week before the GGOS Days 2026, the TIGER Symposium of IAG Commission 3 (28 September to 1 October) and a GGOS Topical Meeting on Geohazards (2nd October) will also be held in Gävle. Participants of the GGOS Days 2026 are also welcome to attend the TIGER Symposium and the GGOS Topical Meeting on Geohazards.
Topics
- Updates on global geodetic infrastructure
- Status of novel satellite missions relevant to Geodesy
- Optimisation of geodetic infrastructure
- Updates from the IAG Services
- Standardisation, integration, and optimisation of geodetic products
- Essential Geodetic Variables (EGV)
- Review of requirements and standards for geodetic products
- Management and dissemination of geodetic data and products
- Networking with external stakeholders
- Communication and public outreach
- Enhancement of geodetic collaboration at regional level
- Advances of the GGOS Focus Areas: Geodesic Space Weather Research, Artificial Intelligence for Geodesy, Geohazards Monitoring
Dates
| Registration deadline | 31 July 2026 |
| On-site participation confirmation | 15 August 2026 |
| Schedule and conference program | 31 August 2026 |
| List of participants | 15 September 2026 |
| GGOS Days 2026 | 5 – 7 October 2026 |
Registration
The GGOS Days 2026 meeting is open to everyone, but the following colleagues are strongly encouraged to attend:
- GGOS Governing Board members
- GGOS Science Panel members
- GGOS Affiliates representatives and contributors
- GGOS Focus Areas chairs and contributors, including associated study/working group members
- GGOS Bureaus and associated committees and study/working group members.
The meeting will take place in-person and online. Participation is free (no registration fee), but registration is required (see online form below), mainly to ensure room capacity for in-person attendance and to coordinate the online communication. Please only register to attend in-person if you are certain that you will be able to travel to Gävle. By registering, the participants agree that their data will be stored internally in the GGOS records. The data will only be used for meeting-related organisational issues. In-person participation will be confirmed by 15 August. If any registered participant is not able to attend the meeting, they are asked to withdraw their pre-registration as soon as possible (by contact form).
Registration for connected events
- GGOS Topical Meeting on Geohazards (Oct. 2)
- TIGER Symposium (Sept. 28 – Oct 1.)
Register here for GGOS Days 2026
Registration Deadline: July 31, 2026
Travel Award
The GGOS Days 2026 meeting is sponsored by the International Association of Geodesy (IAG) and early career scientists and colleagues from low-income countries may apply for an IAG travel award to facilitate their participation in the meeting. The application should be made at least three months before the meeting and the applicant should present their research results during the meeting. Further details can be found at https://geodesy.science/iag/awards/iag-travel-award/.
Travel
Venue
The GGOS Days 2026 will be hosted by Lantmäteriet, the Swedish Mapping, Cadastral and Land Registration Authority (https://www.lantmateriet.se/en/), located in:
Gävle (Sweden) is located about 150 km to the north of Stockholm. More information about the city can be found at https://www.visitgavle.se/en.
Arrival
By air : The closest airport is Stockholm Arlanda Airport (airport code ARN), which has daily connections to many European and worldwide destinations through scheduled services of a large number of international airlines. It is the largest airport in Sweden. The airport has frequent train connections to Gävle via the station Arlanda C, which is located between the terminals 5 and 4.
By train: Gävle’s railway station is located very close to the city centre. Timetables and tickets are supplied by SJ, https://www.sj.se/en.
By car: Those wishing to drive to Gävle need to enter the Scandinavian peninsula taking either a ferry to Gothenburg, Stockholm or Trelleborg, or using the Øresund Bridge, the connection between Denmark (Copenhagen) and Sweden (Malmö).
Accommodation
Information about hotel reservation will be provided to onsite participants later.
Visa
Sweden is a member of the European Union; therefore, no visa is needed for E.U. citizens. Non ‐ E.U. participants should contact their nearest Swedish Embassy or Consulate for further information. For a complete list of countries who do need to apply for a visa, check https://www.government.se/government-policy/migration-and-asylum/list-of-foreign-citizens-who-require-visa-for-entry-into-sweden/. If you do need a visa, please visit https://www.government.se/government-policy/migration-and-asylum/information-on-visas/ to find more details. Those who require a formal invitation for the purpose of obtaining a visa, or raising travel funds in their country, may contact the organisation team . Only those participants who have confirmed their contribution to the GGOS Topical Meeting will receive a formal invitation letter. Travel and medical insurance, if required, are the sole responsibility of the participant.
Contact
GGOS Coordinating Office, contact form
Coordination team
- Laura Sánchez, President of GGOS, Technische Universität München, Deutsches Geodätisches Forschungsinstitut (DGFI-TUM), Germany
- Martin Sehnal, Director of the GGOS Coordinating Office, BEV – Federal Office of Metrology and Surveying, Austria
- Martin Lidberg, Head of Department of Geodetic Infrastructure at Lantmäteriet, Deputy Director of the GGOS Bureau of Networks and Observations (GGOS BNO), Lantmäteriet, the Swedish Mapping, Cadastral and Land Registration Authority, , Sweden
- Rebekka Steffen, President of IAG Commission 3 (Earth Rotation and Geodynamics), Lantmäteriet, the Swedish Mapping, Cadastral and Land Registration Authority, Sweden
- Anna Riddell, Vice-president of GGOS, Geoscience Australia, Australia
- Detlef Angermann, Director of the GGOS Bureau of Products and Standards (GGOS BPS), Technische Universität München, Deutsches Geodätisches Forschungsinstitut (DGFI-TUM), Germany
- José C. Rodríguez, Director of the GGOS Bureau of Networks and Observations (GGOS BNO), Instituto Geográfico Nacional (IGN), Spain.
Code of Conduct
GGOS follows the Code of Conduct of the International Union of Geodesy and Geophysics (IUGG) and their anti-harassment guidelines. These code and guidelines apply for all GGOS meetings. GGOS opposes any discrimination or harassment based on such factors as age, citizenship, disability, ethnic origin, gender identity, language, political or other opinion, religion, or sexual orientation. We will follow IUGG’s Anti-Harassment Guidelines to prevent any form of harassment or discrimination, and to ensure an inclusive atmosphere that encourages the free expression and exchange of scientific ideas and results.
All attendees of GGOS meetings have a role to play in creating an inviting and harassment-free environment through their own behaviour and by discouraging harassment and discrimination by others.
Expected Behaviour
- All attendees are treated with respect and consideration, valuing a diversity of views and opinions.
- The meeting creates an environment to allow for the professional exchange of information.
- Be considerate, respectful and collaborative. Communicate openly with respect for others, critiquing ideas rather than individuals.
- Avoid personal attacks directed toward other attendees, the local organisers or guests. Be mindful of your surroundings and of your fellow participants.
- Alert the local organisers if you notice a dangerous situation or someone in distress.
Unacceptable Behaviour
- Discrimination, harassment or intimidation is unacceptable and will not be tolerated. The local organisers may take any action necessary and deemed appropriate (see below) if attendees engage in unacceptable behaviour including removal from the meeting without warning or refund.
- Recording or taking photography of another individual’s presentation without the explicit permission of the authors is not allowed.
- Disruption of talks at oral or poster sessions, any receptions, or satellite events within the meeting in other venues.
Reporting Unacceptable Behaviour
- If you are the subject to unacceptable behaviour or may have witnessed such behaviour that violates professional and respectful participant conduct, please immediately notify the chairperson of the session if the incident has occurred during the meeting or local organisers.
- Notification can be done by contacting a local organiser on-site (e.g. at the registration desk) or you can e-mail your concern by contact form.
- All reports will remain confidential.
Actions to prevent unacceptable behaviour
- If a clear case of verbal discrimination, harassment or intimidation during a scientific session is established to have occurred, the Chairperson should act immediately to stop it. If the situation deteriorates, the Chairperson should ask the offender to leave the room.
- If any form of harassment occurs in a less openly visible way (e.g. during social activities or informal gatherings), the affected person and/or witness(es) should immediately report it to one of the organisers. The affected person has the option to pursue a formal procedure.
- In cases described above, the organiser should prepare written notes of the incident, attaching any evidence and identifying any witnesses. The organiser should then give the alleged offender the opportunity to be heard and to respond to the allegation.
- A full report of the incident should then be sent to the organisers via contact form
- , who will promptly report to the IAG and IUGG Officers any case of harassment that occurred during an IAG or IUGG-supported meeting.
- Harassment incidents or behaviour that occur outside IAG or IUGG activities referred to above will be considered only when a formal investigation of the case has been conducted by the relevant authority (e.g. the institution, to which the individual is affiliated) and made known to the IAG and IUGG Executive Committees. In those cases that involve an IUGG or Association officer, the Executive Committee may decide to take disciplinary actions against that person.




