GP-B
E817763
GP-B is a NASA space experiment designed to test key predictions of Einstein’s general theory of relativity by measuring tiny changes in the direction of ultra-precise gyroscopes in Earth orbit.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GP-B canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9743235 — 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: GP-B Context triple: [Gravity Probe B, abbreviation, GP-B]
-
A.
GBO
GBO is the common abbreviation used for the Greensboro Grasshoppers minor league baseball team.
-
B.
G3-b
G3-b is one of the small satellite pyramids associated with the Pyramid of Menkaure at the Giza pyramid complex in Egypt.
-
C.
G-blokka
G-blokka is a central Norwegian government office building in Oslo’s Government Quarter, historically housing key ministries and administrative functions.
-
D.
GSB
GSB is Stanford University's renowned graduate business school, offering MBA and other advanced management programs and known for its innovation, entrepreneurship focus, and global impact.
-
E.
GSB
GSB is the commonly used abbreviation for the Main Beskid Trail, a long-distance hiking route that traverses Poland’s Beskid mountain ranges.
- 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: GP-B Target entity description: GP-B is a NASA space experiment designed to test key predictions of Einstein’s general theory of relativity by measuring tiny changes in the direction of ultra-precise gyroscopes in Earth orbit.
-
A.
GBO
GBO is the common abbreviation used for the Greensboro Grasshoppers minor league baseball team.
-
B.
G3-b
G3-b is one of the small satellite pyramids associated with the Pyramid of Menkaure at the Giza pyramid complex in Egypt.
-
C.
G-blokka
G-blokka is a central Norwegian government office building in Oslo’s Government Quarter, historically housing key ministries and administrative functions.
-
D.
GSB
GSB is Stanford University's renowned graduate business school, offering MBA and other advanced management programs and known for its innovation, entrepreneurship focus, and global impact.
-
E.
GSB
GSB is the commonly used abbreviation for the Main Beskid Trail, a long-distance hiking route that traverses Poland’s Beskid mountain ranges.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
physics experiment
ⓘ
relativity experiment ⓘ satellite ⓘ space experiment ⓘ |
| alsoKnownAs |
Gravity Probe-B
ⓘ
linked to:
Gravity Probe B experiment
|
| countryOfOperator |
United States
ⓘ
linked to:
United States of America
|
| dataAnalysisEnd | 2011 ⓘ |
| developedBy |
Lockheed Martin
ⓘ
Stanford University ⓘ |
| fullName |
Gravity Probe B
ⓘ
linked to:
Gravity Probe B experiment
|
| fundedBy | NASA ⓘ |
| launchCountry |
United States
ⓘ
linked to:
United States of America
|
| launchDate | 2004-04-20 ⓘ |
| launchSite |
Vandenberg Air Force Base
ⓘ
linked to:
Vandenberg Space Force Base
|
| launchVehicle | Delta II ⓘ |
| measuresQuantity |
frame-dragging precession rate
ⓘ
precession of gyroscopes ⓘ space-time curvature near Earth ⓘ |
| missionDuration | approximately 1.5 years of science operations ⓘ |
| missionType | space-based test of general relativity ⓘ |
| operatedBy |
NASA
ⓘ
NASA Marshall Space Flight Center ⓘ
linked to:
Marshall Space Flight Center
Stanford University ⓘ |
| orbitCharacteristic |
circular orbit
ⓘ
polar orbit ⓘ |
| orbitInclination | 90.0 degrees ⓘ |
| orbitType | low Earth orbit ⓘ |
| pointsTo | guide star IM Pegasi ⓘ |
| predecessor | Gravity Probe A ⓘ |
| primaryObjective | test predictions of Einstein’s general theory of relativity ⓘ |
| relativityPredictionTested |
Lense–Thirring frame-dragging effect
ⓘ
linked to:
Lense–Thirring effect
geodetic precession of gyroscopes in Earth’s gravitational field ⓘ |
| resultSummary |
confirmed geodetic effect within expected uncertainty
ⓘ
detected frame-dragging effect with larger uncertainty ⓘ |
| sciencePhaseEnd | 2005-08 ⓘ |
| scientificField |
general relativity
ⓘ
gravitational physics ⓘ |
| spaceAgencyProgram |
NASA Gravity Probe program
ⓘ
linked to:
Gravity Probe B experiment
|
| spacecraftBus | custom drag-free spacecraft ⓘ |
| status | mission completed ⓘ |
| targetStar | IM Pegasi ⓘ |
| technologyFeature |
drag-free satellite control system
ⓘ
superconducting gyroscopes ⓘ superfluid helium dewar ⓘ |
| testsEffect |
frame-dragging
ⓘ
geodetic effect ⓘ |
| usesInstrument |
cryogenic gyroscopes
ⓘ
onboard telescope ⓘ ultra-precise gyroscopes ⓘ |
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: GP-B Description of subject: GP-B is a NASA space experiment designed to test key predictions of Einstein’s general theory of relativity by measuring tiny changes in the direction of ultra-precise gyroscopes in Earth orbit.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Gravity Probe B experiment