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Working together to promote and advance the global comparability of measurements

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About us
About us
Benefits of participation
Benefits of participation
Governance
Governance
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Our Mission and Objectives
Historical information
Historical information
150th anniversary
Coordination
Coordination
CIPM MRA
CIPM MRA
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CIPM Forums
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CIPM Consultative Committees
CIPM Consultative Committees
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Guides in Metrology Committee: JCGM
Guides in Metrology Committee: JCGM
International reference time scales
International reference time scales
Laboratory medicine: JCTLM
Laboratory medicine: JCTLM
Liaison
Liaison
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Institutional liaisons
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Joint Committees
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Regional metrology organizations
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Technical/Scientific
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The SI
Technical areas of the BIPM
Technical areas of the BIPM
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Publications & Events
Publications
Publications
Metrology resources
Metrology resources
Events
Events

Metrology areas
AUV: Acoustics, Ultrasound and Vibrations

CCAUV

BIPM contact: Dr Gianna Panfilo

EM : Electricity and Magnetism

Metrologia: Focus on Metrology in Electricity and Magnetism

CCEM

BIPM contact: Dr Michael Stock

L: Length

CCL

BIPM contact: Dr Gianna Panfilo

M: Mass and related quantities

CCM

BIPM contact: Dr Hao Fang

PR: Photometry and Radiometry

QM: Chemistry and Biology

People

RI: Ionizing radiation

T: Thermometry

TF: Time and Frequency

CCTF

BIPM Time Department Database

Time FTP Server

BIPM contact: Dr Patrizia Tavella

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CCU

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Metrology areas
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Metrology areas

AUV: Acoustics, Ultrasound and Vibrations
- CCAUV
- BIPM contact: Dr Gianna Panfilo
EM : Electricity and Magnetism
L: Length
- CCL
- BIPM contact: Dr Gianna Panfilo
M: Mass and related quantities
- CCM
- BIPM contact: Dr Hao Fang
PR: Photometry and Radiometry
QM: Chemistry and Biology
- People
RI: Ionizing radiation
T: Thermometry
TF: Time and Frequency
U
- CCU

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Metrology areas
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The 2018 revision of the SI
World Metrology Day
International Vocabulary of Metrology (VIM)
Metrologia
Guide to the Expression of Uncertainty in Measurement
Autres publications
- Resolutions of the CGPM
- Time FTP Server
Capacity Broadening & Knowledge Transfer (CBKT)
NMI Directors and Member State Representatives
- BIPM strategy document
- Toolbox: Benefits and how to participate
JCRB
tests
- Test URL
KCDB

cctf/cctf-tgutc/2025-03-13

Asset Publisher

CCTF-IERS Workshop on negative leap second

13, 27 March 2025

Publications

Working documents

Sorry, no meeting documents available.

CCTF logo

Asset Publisher

CCTF-TGUTC

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