APT
E729838
APT (Automatic Picture Transmission) is an analog satellite image broadcast format historically used by weather satellites to transmit low-resolution real-time imagery to ground receivers.
All labels observed (1)
| Label | Occurrences |
|---|---|
| APT canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8378586 — 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: APT Context triple: [Polar Operational Environmental Satellites, dataFormat, APT]
-
A.
APT
APT is a widely used command-line package management tool for installing, updating, and removing software on Debian-based Linux systems.
-
B.
APT-P
APT-P was the experimental tilting prototype of British Rail’s Advanced Passenger Train, built to test high-speed rail technology in the 1970s–80s.
-
C.
APT-E
APT-E was an experimental British tilting high-speed train prototype developed in the 1970s to test advanced technologies for the Advanced Passenger Train program.
-
D.
APT-S
APT-S was a proposed production variant of British Rail’s experimental tilting Advanced Passenger Train, intended for regular high-speed passenger service.
-
E.
arp
Arp is the ISO 639-3 language code for the Arapaho language, an Algonquian language spoken by the Arapaho people of the United States.
- 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: APT Target entity description: APT (Automatic Picture Transmission) is an analog satellite image broadcast format historically used by weather satellites to transmit low-resolution real-time imagery to ground receivers.
-
A.
APT
APT is a widely used command-line package management tool for installing, updating, and removing software on Debian-based Linux systems.
-
B.
APT-P
APT-P was the experimental tilting prototype of British Rail’s Advanced Passenger Train, built to test high-speed rail technology in the 1970s–80s.
-
C.
APT-E
APT-E was an experimental British tilting high-speed train prototype developed in the 1970s to test advanced technologies for the Advanced Passenger Train program.
-
D.
APT-S
APT-S was a proposed production variant of British Rail’s experimental tilting Advanced Passenger Train, intended for regular high-speed passenger service.
-
E.
arp
Arp is the ISO 639-3 language code for the Arapaho language, an Algonquian language spoken by the Arapaho people of the United States.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
analog transmission system
ⓘ
satellite image broadcast format ⓘ |
| abbreviationFor | Automatic Picture Transmission ⓘ |
| advantage | low-cost reception ⓘ |
| associatedOrganization |
EUMETSAT
ⓘ
NOAA ⓘ |
| category |
Earth observation data format
ⓘ
weather satellite downlink format ⓘ |
| channelContent |
infrared imagery
ⓘ
visible light imagery ⓘ |
| dataContent |
basic weather patterns
ⓘ
cloud cover imagery ⓘ |
| dataTypeTransmitted |
satellite imagery
ⓘ
weather images ⓘ |
| designedFor | direct broadcast to small ground stations ⓘ |
| eraOfProminentUse | late 20th century ⓘ |
| frequencyBand | VHF band (for many APT transmissions) ⓘ |
| fullName | Automatic Picture Transmission ⓘ |
| historicalUsage | historically used by weather satellites ⓘ |
| imageEncoding | line-by-line analog video ⓘ |
| imageFormat | black-and-white analog image with overlaid telemetry ⓘ |
| imageResolution | low-resolution ⓘ |
| imageScanDirection | along satellite ground track ⓘ |
| intendedReceiver |
amateur radio weather satellite stations
ⓘ
ground receivers ⓘ |
| limitation |
limited spatial resolution
ⓘ
susceptibility to analog noise ⓘ |
| modulationMethod | analog FM subcarrier (for image information) ⓘ |
| primaryOrbitType | polar-orbiting weather satellites ⓘ |
| purpose | distribution of real-time weather imagery ⓘ |
| requires | simple ground receiving equipment ⓘ |
| scanLineStructure | two image channels interleaved in lines ⓘ |
| status | largely superseded ⓘ |
| successorFormat |
HRPT
ⓘ
LRPT ⓘ digital weather satellite broadcast formats ⓘ |
| supports | real-time imagery ⓘ |
| temporalResolution | near real-time passes over receiving station ⓘ |
| transmissionMode | continuous during satellite pass ⓘ |
| transmissionType | analog ⓘ |
| typicalUsers |
educational institutions
ⓘ
hobbyists ⓘ meteorological services ⓘ |
| usedBy | weather satellites ⓘ |
| usedOn |
NOAA polar-orbiting satellites
ⓘ
linked to:
NOAA satellites
|
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: APT Description of subject: APT (Automatic Picture Transmission) is an analog satellite image broadcast format historically used by weather satellites to transmit low-resolution real-time imagery to ground receivers.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.