uplink
Definition
Noun: 1. A transmission from Earth to a spacecraft or satellite: The signal, data, or communication sent from a ground station on Earth to an orbiting spacecraft, satellite, or aircraft. 2. The path or channel for such a transmission: The specific radio frequency band or communication link used to send signals from the ground to a spacecraft.
Usage
The term is used primarily in the context of space communications, telecommunications, and broadcasting. It specifies the direction of the signal flow (Earth to space) and is often contrasted with "downlink."
Examples
- Noun:
- The mission control center established a strong uplink to send new navigation coordinates to the Mars rover.
- The satellite's uplink frequency is different from its downlink frequency to avoid interference.
- Engineers are troubleshooting a problem with the data uplink to the space station.
Advanced Usage
- "Uplink center" or "Uplink facility": A ground-based station equipped with large antennas and transmitters specifically designed to send signals to satellites.
- The broadcast was sent from an uplink facility in California.
- "Uplink time": The scheduled period during which communication from Earth to a spacecraft is possible or authorized.
- We have a five-minute uplink time to transmit the software patch.
Variants and Related Words
- Uplink (verb): To transmit data or signals to a spacecraft or satellite. (Less common than the noun form).
- They will uplink the commands at 1400 hours.
- Downlink (noun): The transmission path or signal from a spacecraft or satellite to Earth.
- Ground station: The terrestrial terminal designed for extra-planetary communication with spacecraft.
Synonyms
- Transmission (upward)
- Command link (specifically for sending control commands)
- Forward link
Antonyms
- Downlink
Related Phrases
- "Uplink/downlink": A common paired phrase describing the two-way communication circuit between Earth and a spacecraft.
- The satellite maintains constant uplink/downlink capabilities.
Noun
-
a transmission from Earth to a spacecraft or the path of such a transmission
