PSLV-D2
E910518
PSLV-D2 was the second developmental flight of India’s Polar Satellite Launch Vehicle (PSLV), marking an early step in establishing the PSLV as a reliable workhorse for ISRO’s satellite launches.
All labels observed (1)
| Label | Occurrences |
|---|---|
| PSLV-D2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11175962 — 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: PSLV-D2 Context triple: [PSLV-D1, successorMission, PSLV-D2]
-
A.
PSLV-D1
PSLV-D1 was the inaugural developmental mission of India’s Polar Satellite Launch Vehicle (PSLV), marking the rocket’s first test flight.
-
B.
PSLV-DL
PSLV-DL is a two-strap-on variant of India’s Polar Satellite Launch Vehicle designed to flexibly launch small to medium payloads into Earth orbit.
-
C.
PSLV-C2
PSLV-C2 is an Indian Polar Satellite Launch Vehicle mission that successfully deployed multiple satellites into orbit, including Oceansat-1, marking an early milestone in ISRO’s commercial and remote-sensing launch capabilities.
-
D.
PSLV-C20
PSLV-C20 is an Indian Polar Satellite Launch Vehicle mission that successfully launched multiple satellites, including the Canadian NEOSSat space telescope, into orbit.
-
E.
PSLV-C11
PSLV-C11 is an upgraded variant of India’s Polar Satellite Launch Vehicle that successfully launched the country’s first lunar mission, Chandrayaan-1.
- 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: PSLV-D2 Target entity description: PSLV-D2 was the second developmental flight of India’s Polar Satellite Launch Vehicle (PSLV), marking an early step in establishing the PSLV as a reliable workhorse for ISRO’s satellite launches.
-
A.
PSLV-D1
PSLV-D1 was the inaugural developmental mission of India’s Polar Satellite Launch Vehicle (PSLV), marking the rocket’s first test flight.
-
B.
PSLV-DL
PSLV-DL is a two-strap-on variant of India’s Polar Satellite Launch Vehicle designed to flexibly launch small to medium payloads into Earth orbit.
-
C.
PSLV-C2
PSLV-C2 is an Indian Polar Satellite Launch Vehicle mission that successfully deployed multiple satellites into orbit, including Oceansat-1, marking an early milestone in ISRO’s commercial and remote-sensing launch capabilities.
-
D.
PSLV-C20
PSLV-C20 is an Indian Polar Satellite Launch Vehicle mission that successfully launched multiple satellites, including the Canadian NEOSSat space telescope, into orbit.
-
E.
PSLV-C11
PSLV-C11 is an upgraded variant of India’s Polar Satellite Launch Vehicle that successfully launched the country’s first lunar mission, Chandrayaan-1.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
PSLV mission
ⓘ
launch vehicle flight ⓘ |
| abbreviationExpansion | Polar Satellite Launch Vehicle – Developmental flight 2 NERFINISHED ⓘ |
| agency | Department of Space, Government of India NERFINISHED ⓘ |
| apogeeAltitude | approximately 830 km ⓘ |
| country | India ⓘ |
| developmentalFlightNumber | 2 ⓘ |
| family | PSLV launch vehicle family NERFINISHED ⓘ |
| firstStagePropellant | solid ⓘ |
| flightNumberInProgram | 2 ⓘ |
| followedBy | PSLV-D3 NERFINISHED ⓘ |
| fourthStagePropellant | liquid ⓘ |
| inclination | approximately 98 degrees ⓘ |
| launchCountry | India NERFINISHED ⓘ |
| launchDate |
15 October 1994
ⓘ
1994-10-15 ⓘ |
| launchMassClass | medium-lift launch vehicle flight ⓘ |
| launchOutcome | success ⓘ |
| launchPad | First Launch Pad, Sriharikota NERFINISHED ⓘ |
| launchSite |
Satish Dhawan Space Centre
NERFINISHED
ⓘ
Sriharikota NERFINISHED ⓘ |
| launchVehicle |
PSLV
NERFINISHED
ⓘ
Polar Satellite Launch Vehicle NERFINISHED ⓘ |
| launchVehicleVariant | PSLV core-alone early developmental configuration ⓘ |
| missionType |
Earth observation satellite launch
ⓘ
orbital launch ⓘ technology demonstration ⓘ |
| operator |
Indian Space Research Organisation
ⓘ
surface form:
ISRO
Indian Space Research Organisation ⓘ |
| orbitType |
Sun-synchronous orbit
ⓘ
polar orbit ⓘ |
| payloadOwner | Indian Space Research Organisation NERFINISHED ⓘ |
| payloadType | remote sensing satellite ⓘ |
| perigeeAltitude | approximately 820 km ⓘ |
| precededBy | PSLV-D1 NERFINISHED ⓘ |
| primaryPayload | IRS-P2 NERFINISHED ⓘ |
| program | PSLV programme NERFINISHED ⓘ |
| relatedInfrastructure | ISRO Telemetry, Tracking and Command Network NERFINISHED ⓘ |
| secondStagePropellant | liquid ⓘ |
| significance |
early step in establishing PSLV as a reliable workhorse launcher
ⓘ
first fully successful PSLV mission ⓘ second developmental flight of PSLV ⓘ |
| stageConfiguration | four-stage launch vehicle ⓘ |
| status | completed mission ⓘ |
| thirdStagePropellant | solid ⓘ |
| usedFor | placing IRS-P2 into Sun-synchronous orbit ⓘ |
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: PSLV-D2 Description of subject: PSLV-D2 was the second developmental flight of India’s Polar Satellite Launch Vehicle (PSLV), marking an early step in establishing the PSLV as a reliable workhorse for ISRO’s satellite launches.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.