Landsat 4
E405681
Landsat 4 was an Earth observation satellite in the Landsat program that significantly improved global land imaging with enhanced sensors and higher-resolution data.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Landsat 4 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3918672 — 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.
Target entity: Landsat 4 Context triple: [Landsat satellites, hasMember, Landsat 4]
-
A.
Terra satellite
Terra is a flagship NASA Earth observation satellite that carries multiple instruments to monitor the planet’s climate, land, oceans, and atmosphere from polar orbit.
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B.
Landsat satellites
Landsat satellites are a series of Earth-observing spacecraft that provide long-term, continuous multispectral imagery used worldwide for environmental monitoring, land-use mapping, and resource management.
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C.
Landsat 9
Landsat 9 is a NASA and USGS Earth observation satellite that continues the decades-long Landsat program by collecting high-resolution multispectral imagery to monitor and study changes on the planet’s surface.
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D.
Operational Land Imager
The Operational Land Imager is a multispectral imaging sensor on Landsat 8 designed to capture high-resolution, calibrated images of Earth’s land surfaces for environmental monitoring and land-use analysis.
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E.
Shuttle Imaging Radar-B
Shuttle Imaging Radar-B was a spaceborne synthetic aperture radar instrument flown on the Space Shuttle to study Earth's surface and environmental features through all-weather, day-and-night imaging.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Landsat 4 Target entity description: Landsat 4 was an Earth observation satellite in the Landsat program that significantly improved global land imaging with enhanced sensors and higher-resolution data.
-
A.
Terra satellite
Terra is a flagship NASA Earth observation satellite that carries multiple instruments to monitor the planet’s climate, land, oceans, and atmosphere from polar orbit.
-
B.
Landsat satellites
Landsat satellites are a series of Earth-observing spacecraft that provide long-term, continuous multispectral imagery used worldwide for environmental monitoring, land-use mapping, and resource management.
-
C.
Landsat 9
Landsat 9 is a NASA and USGS Earth observation satellite that continues the decades-long Landsat program by collecting high-resolution multispectral imagery to monitor and study changes on the planet’s surface.
-
D.
Operational Land Imager
The Operational Land Imager is a multispectral imaging sensor on Landsat 8 designed to capture high-resolution, calibrated images of Earth’s land surfaces for environmental monitoring and land-use analysis.
-
E.
Shuttle Imaging Radar-B
Shuttle Imaging Radar-B was a spaceborne synthetic aperture radar instrument flown on the Space Shuttle to study Earth's surface and environmental features through all-weather, day-and-night imaging.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
Earth observation satellite
ⓘ
Landsat spacecraft ⓘ artificial satellite ⓘ remote sensing satellite ⓘ |
| altitude | approximately 705 kilometers ⓘ |
| application |
agricultural monitoring
ⓘ
environmental change detection ⓘ forestry assessment ⓘ land use and land cover mapping ⓘ water resources monitoring ⓘ |
| bus | Multimission Modular Spacecraft ⓘ |
| countryOfOperator | United States of America ⓘ |
| dataArchive |
USGS EarthExplorer
ⓘ
USGS EarthExplorer ⓘ
surface form:
USGS LandsatLook Viewer
|
| dataDownlink |
Tracking and Data Relay Satellite System
ⓘ
ground stations ⓘ |
| deactivationDate | 2001-06-15 ⓘ |
| followedBy | Landsat 5 ⓘ |
| imagingCapability | multispectral imaging ⓘ |
| inclination | 98.2 degrees ⓘ |
| launchContractor | McDonnell Douglas ⓘ |
| launchDate | 1982-07-16 ⓘ |
| launchSite |
Vandenberg Air Force Base Space Launch Complex 3E
ⓘ
surface form:
Vandenberg Air Force Base Space Launch Complex 3W
|
| launchVehicle |
Delta 3910
ⓘ
surface form:
Delta 3920
|
| localTimeOfDescendingNode | 09:45 ⓘ |
| manufacturer | GE Astro Space ⓘ |
| massAtLaunch | approximately 1950 kilograms ⓘ |
| missionType |
Earth observation
ⓘ
land remote sensing ⓘ |
| notableImprovement |
higher spatial resolution than earlier Landsat satellites
ⓘ
introduction of Thematic Mapper sensor ⓘ more spectral bands than Multispectral Scanner-only missions ⓘ |
| operator |
NASA
ⓘ
United States Geological Survey ⓘ |
| orbitalPeriod | approximately 99 minutes ⓘ |
| orbitRegime | low Earth orbit ⓘ |
| orbitType | Sun-synchronous orbit ⓘ |
| partOf |
Landsat satellites
ⓘ
surface form:
Landsat program
|
| power | about 1430 watts ⓘ |
| precededBy | Landsat 3 ⓘ |
| primaryInstrument |
Landsat 5
ⓘ
surface form:
Multispectral Scanner
Landsat 4-5 TM ⓘ
surface form:
Thematic Mapper
|
| programPosition | first of the second-generation Landsat satellites ⓘ |
| spatialResolution |
120 meters for Thematic Mapper thermal band (original)
ⓘ
30 meters for Thematic Mapper reflective bands ⓘ 60 meters for Multispectral Scanner ⓘ |
| spectralBands |
near infrared
ⓘ
shortwave infrared ⓘ thermal infrared ⓘ visible ⓘ |
| status | mission ended ⓘ |
| temporalResolution | 16 days repeat cycle ⓘ |
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.
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.
Subject: Landsat 4 Description of subject: Landsat 4 was an Earth observation satellite in the Landsat program that significantly improved global land imaging with enhanced sensors and higher-resolution data.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.