BIPM Circular T
E497208
BIPM Circular T is a regular publication by the International Bureau of Weights and Measures that reports and disseminates official data on International Atomic Time (TAI) and Coordinated Universal Time (UTC).
All labels observed (1)
| Label | Occurrences |
|---|---|
| BIPM Circular T canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5150600 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BIPM Circular T Context triple: [TAI, definedBy, BIPM Circular T]
-
A.
25th General Conference on Weights and Measures
The 25th General Conference on Weights and Measures was a formal international meeting of member states that addressed key updates and decisions regarding the global system of units (SI).
-
B.
27th General Conference on Weights and Measures
The 27th General Conference on Weights and Measures was a formal international meeting of member states responsible for making high-level decisions on the global system of units (SI) and other metrological standards.
-
C.
26th General Conference on Weights and Measures
The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.
-
D.
International Bureau of Weights and Measures
The International Bureau of Weights and Measures is an international organization that maintains the global system of units (SI) and ensures worldwide uniformity of measurements and time standards.
-
E.
European Association of National Metrology Institutes
The European Association of National Metrology Institutes (EURAMET) is a regional organization that coordinates and promotes collaboration among Europe’s national metrology institutes to ensure consistent and accurate measurement standards.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: BIPM Circular T Target entity description: BIPM Circular T is a regular publication by the International Bureau of Weights and Measures that reports and disseminates official data on International Atomic Time (TAI) and Coordinated Universal Time (UTC).
-
A.
25th General Conference on Weights and Measures
The 25th General Conference on Weights and Measures was a formal international meeting of member states that addressed key updates and decisions regarding the global system of units (SI).
-
B.
27th General Conference on Weights and Measures
The 27th General Conference on Weights and Measures was a formal international meeting of member states responsible for making high-level decisions on the global system of units (SI) and other metrological standards.
-
C.
26th General Conference on Weights and Measures
The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.
-
D.
International Bureau of Weights and Measures
The International Bureau of Weights and Measures is an international organization that maintains the global system of units (SI) and ensures worldwide uniformity of measurements and time standards.
-
E.
European Association of National Metrology Institutes
The European Association of National Metrology Institutes (EURAMET) is a regional organization that coordinates and promotes collaboration among Europe’s national metrology institutes to ensure consistent and accurate measurement standards.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
metrology document
ⓘ
timekeeping publication ⓘ |
| abbreviation | Circular T NERFINISHED ⓘ |
| access | publicly available ⓘ |
| hasAudience |
GNSS timing users
ⓘ
national metrology institutes ⓘ scientific community ⓘ time laboratories ⓘ timekeeping infrastructure operators ⓘ |
| hasMainTopic |
TAI
NERFINISHED
ⓘ
TAI realization ⓘ UTC NERFINISHED ⓘ UTC realization ⓘ UTC-UTC(k) offsets ⓘ clock comparison results ⓘ frequency standards evaluation ⓘ leap second information ⓘ time laboratory contributions ⓘ time scale differences ⓘ time scale steering information ⓘ time transfer techniques ⓘ |
| isPartOf | BIPM time department activities ⓘ |
| isRelatedTo |
BIPM key comparison of time scales
NERFINISHED
ⓘ
Consultative Committee for Time and Frequency NERFINISHED ⓘ International System of Units NERFINISHED ⓘ UTC(k) NERFINISHED ⓘ global time scale coordination ⓘ time and frequency metrology ⓘ |
| language | English ⓘ |
| maintainedBy | BIPM Time Department NERFINISHED ⓘ |
| medium |
PDF document
ⓘ
electronic publication ⓘ |
| provides |
differences between TAI and local realizations
ⓘ
differences between UTC and UTC(k) ⓘ information on primary frequency standards contributions ⓘ official data on TAI ⓘ official data on UTC ⓘ traceability information for time scales ⓘ uncertainties of time links ⓘ |
| publishedBy | International Bureau of Weights and Measures NERFINISHED ⓘ |
| publisherAcronym | BIPM NERFINISHED ⓘ |
| purpose |
coordination of international timekeeping
ⓘ
dissemination of official time scale data ⓘ support of legal and scientific timekeeping ⓘ |
| reportsOn |
Coordinated Universal Time
NERFINISHED
ⓘ
International Atomic Time NERFINISHED ⓘ |
| subjectArea |
time metrology
ⓘ
time scale coordination ⓘ timekeeping ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: BIPM Circular T Description of subject: BIPM Circular T is a regular publication by the International Bureau of Weights and Measures that reports and disseminates official data on International Atomic Time (TAI) and Coordinated Universal Time (UTC).
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.