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.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
analog transmission system
ⓘ
satellite image broadcast format ⓘ |
| abbreviationFor | Automatic Picture Transmission NERFINISHED ⓘ |
| advantage | low-cost reception ⓘ |
| associatedOrganization |
EUMETSAT
NERFINISHED
ⓘ
NOAA NERFINISHED ⓘ |
| 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 NERFINISHED ⓘ |
| 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| status | largely superseded ⓘ |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 NERFINISHED ⓘ 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 NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.