IERS Bulletin A
E886076
IERS Bulletin A is a regularly issued publication by the International Earth Rotation and Reference Systems Service that provides rapid updates and predictions of Earth orientation parameters and time scale differences such as UT1–UTC.
All labels observed (2)
| Label | Occurrences |
|---|---|
| IERS Bulletin A canonical | 1 |
| IERS Bulletins | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10791445 — 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: IERS Bulletin A Context triple: [IERS Rapid Service/Prediction Centre, outputFormat, IERS Bulletin A]
-
A.
IERS Conventions
IERS Conventions are a set of internationally recognized technical standards and models that define how to precisely measure and reference Earth’s rotation, orientation, and reference frames for geodesy and astronomy.
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B.
IERS Central Bureau
The IERS Central Bureau is the coordinating office of the International Earth Rotation and Reference Systems Service, responsible for managing its operations and disseminating Earth orientation and reference system data.
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C.
IERS ICRS Centre
The IERS ICRS Centre is the component of the International Earth Rotation and Reference Systems Service responsible for realizing, maintaining, and providing access to the International Celestial Reference System used for precise astronomical and geodetic measurements.
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D.
IERS Rapid Service/Prediction Centre
The IERS Rapid Service/Prediction Centre is a specialized unit that rapidly determines and forecasts Earth orientation parameters, such as polar motion and variations in the length of day, for global geodetic and astronomical applications.
-
E.
International Celestial Reference System
The International Celestial Reference System is the standard, high-precision coordinate framework used in astronomy and geodesy to define positions of celestial objects relative to distant quasars.
- 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: IERS Bulletin A Target entity description: IERS Bulletin A is a regularly issued publication by the International Earth Rotation and Reference Systems Service that provides rapid updates and predictions of Earth orientation parameters and time scale differences such as UT1–UTC.
-
A.
IERS Conventions
IERS Conventions are a set of internationally recognized technical standards and models that define how to precisely measure and reference Earth’s rotation, orientation, and reference frames for geodesy and astronomy.
-
B.
IERS
The International Earth Rotation and Reference Systems Service (IERS) is an international organization that provides global standards and data for Earth rotation, reference frames, and timekeeping used in astronomy, geodesy, and navigation.
-
C.
IERS Central Bureau
The IERS Central Bureau is the coordinating office of the International Earth Rotation and Reference Systems Service, responsible for managing its operations and disseminating Earth orientation and reference system data.
-
D.
IERS ICRS Centre
The IERS ICRS Centre is the component of the International Earth Rotation and Reference Systems Service responsible for realizing, maintaining, and providing access to the International Celestial Reference System used for precise astronomical and geodetic measurements.
-
E.
IERS Rapid Service/Prediction Centre
The IERS Rapid Service/Prediction Centre is a specialized unit that rapidly determines and forecasts Earth orientation parameters, such as polar motion and variations in the length of day, for global geodetic and astronomical applications.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
scientific bulletin
ⓘ
technical publication ⓘ |
| access |
free of charge
ⓘ
online ⓘ |
| complements | IERS Bulletin B ⓘ |
| dataFormat |
tabular data
ⓘ
time series ⓘ |
| focusesOn |
Earth orientation parameters
ⓘ
time scale differences ⓘ |
| hasAudience |
navigation service providers
ⓘ
scientific community ⓘ time and frequency laboratories ⓘ |
| hasUpdateType | rapid ⓘ |
| includesContentType |
Earth orientation predictions
ⓘ
UT1–UTC predictions ⓘ rapid service results ⓘ short-term predictions ⓘ |
| includesParameter |
UT1–UTC
ⓘ
celestial pole offsets ⓘ polar motion ⓘ |
| issuedBy |
IERS Rapid Service/Prediction Center
ⓘ
linked to:
IERS Rapid Service/Prediction Centre
|
| language | English ⓘ |
| partOf | IERS products ⓘ |
| provides |
Earth orientation parameter series
ⓘ
differences between UT1 and UTC ⓘ predictions of UT1–UTC ⓘ predictions of polar motion ⓘ |
| publishedBy | International Earth Rotation and Reference Systems Service ⓘ |
| publisherAcronym | IERS ⓘ |
| relatedTo |
Earth rotation
ⓘ
astronomy ⓘ geodesy ⓘ reference systems ⓘ timekeeping ⓘ |
| subjectArea | Earth rotation and reference systems ⓘ |
| timeScaleCovered |
TAI
ⓘ
UT1 ⓘ UTC ⓘ |
| usedBy |
astronomical observatories
ⓘ
geodetic services ⓘ space agencies ⓘ timekeeping organizations ⓘ |
| usedFor |
geophysical studies
ⓘ
high-precision timekeeping ⓘ satellite orbit determination ⓘ space navigation ⓘ |
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: IERS Bulletin A Description of subject: IERS Bulletin A is a regularly issued publication by the International Earth Rotation and Reference Systems Service that provides rapid updates and predictions of Earth orientation parameters and time scale differences such as UT1–UTC.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: IERS Bulletin A