IERS - IERS --><br>IERS
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International Earth Rotation and Reference Systems Service
Themen
Organization
The IERS was established in 1987 by the International Astronomical Union and the International Union of Geodesy and Geophysics. According to the Terms of Reference, the IERS accomplishes its mission through the following components: Technique Centres, Product Centres, Combination Centres, Analysis Coordinator, Central Bureau, Directing Board.
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Data, Products and Tools
The IERS provides data on Earth orientation, on the International Celestial Reference System/Frame, on the International Terrestrial Reference System/Frame, and on geophysical fluids. It maintains also Conventions containing models, constants and standards.
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Publications
The IERS issues Messages to distribute news, Bulletins to provide Earth orientation data, Technical Notes to publish research results and proceedings of workshops, and Annual Reports to inform the public about its work.
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Science background
Information about Earth rotation, reference frames, and observation techniques in general - IAU and IUGG/IAG Resolutions.
The content of this section is currently being revised and is temporarily unavailable.
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News and meetings
View news ordered by date or with respect to publications or general topics of the IERS. Calendars of meetings related to the work of IERS and of IERS Workshops are available.
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News
IERS Bulletin C (leap second announcements) - latest issue
Unexpected IT infrastructure outage resolved - IERS services fully restored
IERS Bulletin A (rapid EOP data and predictions) - latest issue
IERS Message No. 561: International GNSS Service Session at AGU26 - Call for Abstracts
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Meetings
46th COSPAR Scientific Assembly
Florence, Italy
Date
01
Aug
2026
to
09
Aug
2026
AOGS 23rd Annual Meeting
Fukuoka, Japan
Date
02
Aug
2026
to
07
Aug
2026
Workshop on GNSS Ionosphere (IWGI2026)
Neustrelitz, Germany
Date
31
Aug
2026
to
04
Sep
2026
17th European VLBI Network Symposium & Users’ Meeting
Manchester, United Kingdom
Date
14
Sep
2026
to
18
Sep
2026
ION GNSS+ 2026
Orlando, FL, USA
Date
14
Sep
2026
to
18
Sep
2026
VieVS Days 2026
Vienna, Austria
Date
15
Sep
2026
to
16
Sep
2026
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Glossary
Acronyms
IERS components