IRS-1B
E260020
IRS-1B is an Indian remote sensing satellite in the IRS series used primarily for Earth observation and resource monitoring.
All labels observed (2)
| Label | Occurrences |
|---|---|
| IRS-1B canonical | 12 |
| IRS-1B payload suite | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2373151 — 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: IRS-1B Context triple: [IRS series, hasMember, IRS-1B]
-
A.
Space-Based Infrared System
The Space-Based Infrared System (SBIRS) is a U.S. military satellite constellation designed to provide global missile launch detection, missile defense support, and strategic infrared surveillance.
-
B.
IBEX AIR
IBEX AIR is the radio callsign used by Ibex Airlines, a Japanese regional carrier operating domestic and short-haul international flights.
-
C.
ALTAIR radar
ALTAIR radar is a powerful tracking and surveillance radar system located on Kwajalein Atoll, used primarily for space object tracking and missile defense research.
-
D.
BCP 2000 satellite bus
The BCP 2000 satellite bus is a high-power, modular spacecraft platform developed by Boeing for large, long-life communications and Earth-observation satellites in geostationary and other orbits.
-
E.
APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
- 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: IRS-1B Target entity description: IRS-1B is an Indian remote sensing satellite in the IRS series used primarily for Earth observation and resource monitoring.
-
A.
Space-Based Infrared System
The Space-Based Infrared System (SBIRS) is a U.S. military satellite constellation designed to provide global missile launch detection, missile defense support, and strategic infrared surveillance.
-
B.
IBEX AIR
IBEX AIR is the radio callsign used by Ibex Airlines, a Japanese regional carrier operating domestic and short-haul international flights.
-
C.
ALTAIR radar
ALTAIR radar is a powerful tracking and surveillance radar system located on Kwajalein Atoll, used primarily for space object tracking and missile defense research.
-
D.
BCP 2000 satellite bus
The BCP 2000 satellite bus is a high-power, modular spacecraft platform developed by Boeing for large, long-life communications and Earth-observation satellites in geostationary and other orbits.
-
E.
APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
Earth observation satellite
ⓘ
Indian Remote Sensing satellite ⓘ remote sensing satellite ⓘ |
| applications |
agricultural monitoring
ⓘ
disaster management support ⓘ forestry monitoring ⓘ land use mapping ⓘ water resources management ⓘ |
| attitudeControl | three-axis stabilized ⓘ |
| countryOfOrigin | India ⓘ |
| dataUser |
Indian government agencies
ⓘ
resource management organizations ⓘ scientific community ⓘ |
| inclination | approximately 99.2 degrees ⓘ |
| launchCountry | Soviet Union ⓘ |
| launchDate | 1991-08-29 ⓘ |
| launchMass | approximately 975 kg ⓘ |
| launchSite |
Baikonur Cosmodrome
ⓘ
Baikonur Cosmodrome Site 31/6 ⓘ
linked to:
Baikonur Cosmodrome
|
| launchVehicle |
Vostok-2M
ⓘ
linked to:
Vostok-2 rocket
|
| missionType |
Earth observation
ⓘ
resource monitoring ⓘ |
| notable | among earliest operational Indian remote sensing satellites ⓘ |
| operator |
ISRO
ⓘ
linked to:
Indian Space Research Organisation
Indian Space Research Organisation ⓘ |
| orbitalPeriod | approximately 103 minutes ⓘ |
| orbitRegime |
Low Earth orbit
ⓘ
linked to:
low Earth orbit
|
| orbitType | Sun-synchronous orbit ⓘ |
| organizationResponsibleForMission | Indian Space Research Organisation ⓘ |
| partOfSeries | Indian Remote Sensing satellite series ⓘ |
| powerSource | solar panels ⓘ |
| predecessor | IRS-1A ⓘ |
| primaryInstrument |
LISS-I
ⓘ
Linear Imaging Self-Scanning Sensor-I ⓘ |
| program |
Indian Remote Sensing Programme
ⓘ
linked to:
Indian Remote Sensing satellite series
|
| purpose |
Earth resources survey
ⓘ
cartography ⓘ environmental monitoring ⓘ |
| secondaryInstrument |
LISS-II
ⓘ
Linear Imaging Self-Scanning Sensor-II ⓘ |
| spacecraftBus | IRS-1 bus ⓘ |
| spectralBands |
near infrared
ⓘ
visible ⓘ |
| successor | IRS-1C ⓘ |
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: IRS-1B Description of subject: IRS-1B is an Indian remote sensing satellite in the IRS series used primarily for Earth observation and resource monitoring.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Linear Imaging Self-Scanning Sensor-I
subject linked to:
Linear Imaging Self-Scanning Sensor-I
linked to: IRS-1B