GAGAN
E586562
GAGAN (GPS Aided GEO Augmented Navigation) is India’s satellite-based augmentation system that enhances the accuracy and reliability of GPS signals for aviation and other navigation applications.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GAGAN canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T6327566 — 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: GAGAN Context triple: [WAAS, similarTo, GAGAN]
-
A.
INSAT-4G
INSAT-4G is an Indian communications and meteorological satellite planned as part of the INSAT-4 series to support telecommunication, broadcasting, and weather services.
-
B.
GSAT-19
GSAT-19 is an Indian high-throughput communications satellite designed to test next-generation technologies and significantly enhance the country’s data transmission capabilities.
-
C.
INSAT-4E
INSAT-4E is an Indian communications satellite in the INSAT series, designed to provide telecommunication, broadcasting, and related services.
-
D.
INSAT-3DS
INSAT-3DS is an Indian geostationary meteorological and communication satellite in the INSAT series, designed to support weather forecasting, disaster warning, and environmental monitoring.
-
E.
INSAT-3DR
INSAT-3DR is an Indian geostationary weather satellite designed to provide advanced meteorological observations, search and rescue services, and data relay capabilities.
- 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: GAGAN Target entity description: GAGAN (GPS Aided GEO Augmented Navigation) is India’s satellite-based augmentation system that enhances the accuracy and reliability of GPS signals for aviation and other navigation applications.
-
A.
INSAT-4G
INSAT-4G is an Indian communications and meteorological satellite planned as part of the INSAT-4 series to support telecommunication, broadcasting, and weather services.
-
B.
GSAT-19
GSAT-19 is an Indian high-throughput communications satellite designed to test next-generation technologies and significantly enhance the country’s data transmission capabilities.
-
C.
INSAT-4E
INSAT-4E is an Indian communications satellite in the INSAT series, designed to provide telecommunication, broadcasting, and related services.
-
D.
INSAT-3DS
INSAT-3DS is an Indian geostationary meteorological and communication satellite in the INSAT series, designed to support weather forecasting, disaster warning, and environmental monitoring.
-
E.
INSAT-3DR
INSAT-3DR is an Indian geostationary weather satellite designed to provide advanced meteorological observations, search and rescue services, and data relay capabilities.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
SBAS
ⓘ
satellite-based augmentation system ⓘ |
| accuracy |
horizontal accuracy better than 7 meters
ⓘ
vertical accuracy better than 7 meters ⓘ |
| applicationDomain |
civil aviation
ⓘ
land navigation ⓘ maritime navigation ⓘ |
| beneficiary |
airlines operating in Indian airspace
ⓘ
general aviation in India ⓘ land-based navigation users in India ⓘ maritime users in Indian region ⓘ |
| country | India ⓘ |
| developer |
Airports Authority of India
NERFINISHED
ⓘ
Indian Space Research Organisation NERFINISHED ⓘ |
| fullName | GPS Aided GEO Augmented Navigation NERFINISHED ⓘ |
| function |
improves GPS accuracy
ⓘ
improves GPS availability ⓘ improves GPS integrity ⓘ provides differential corrections ⓘ provides integrity information ⓘ |
| governingBody | Directorate General of Civil Aviation (India) NERFINISHED ⓘ |
| operator | Airports Authority of India ⓘ |
| purpose |
augmentation of GPS signals
ⓘ
aviation navigation ⓘ non-aviation navigation applications ⓘ |
| regionServed |
Indian Flight Information Region
NERFINISHED
ⓘ
Indian airspace ⓘ parts of Asia-Pacific region ⓘ |
| relatedSystem |
EGNOS
NERFINISHED
ⓘ
MSAS NERFINISHED ⓘ SISNeT NERFINISHED ⓘ WAAS NERFINISHED ⓘ |
| serviceType |
Safety-of-Life service
ⓘ
navigation augmentation service ⓘ |
| signalCoverage | geostationary satellites over Indian Ocean region ⓘ |
| signalType |
L1
ⓘ
L5 ⓘ |
| standard | ICAO SBAS SARPs NERFINISHED ⓘ |
| status | operational ⓘ |
| supportsService |
approach with vertical guidance
ⓘ
en-route navigation ⓘ terminal area navigation ⓘ |
| technology |
GNSS augmentation
ⓘ
geostationary satellite broadcasting ⓘ |
| usesSatellite |
GSAT-10
NERFINISHED
ⓘ
GSAT-15 NERFINISHED ⓘ GSAT-8 NERFINISHED ⓘ |
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: GAGAN Description of subject: GAGAN (GPS Aided GEO Augmented Navigation) is India’s satellite-based augmentation system that enhances the accuracy and reliability of GPS signals for aviation and other navigation applications.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.