transmission time
Definition
Noun: - The coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body: This term refers to the precise moment, recorded in a standardized global time format, at which a signal or message is dispatched from a ground station on Earth towards a target in space.
Usage
This is a technical term used primarily in the fields of space communication, astronomy, and aerospace engineering. It is a specific point in time, not a duration. - The transmission time for the command signal was logged as 14:23:07 UTC. - Engineers calculated the transmission time to ensure the probe would be in the correct orbital position to receive the instructions.
Advanced Usage
- Critical for synchronization: In deep-space missions, the exact transmission time is crucial for calculating signal travel time (light-time delay) and for synchronizing onboard spacecraft clocks with Earth time.
- Data header information: The transmission time is often embedded in the metadata or header of the sent data packet for precise tracking and analysis.
Variants and Related Words
- Receive time: The coordinated universal time when a transmission is received.
- Round-trip light time: The total time for a signal to travel to a target and back, calculated from the transmission time and the receive time of the return signal.
- UTC (Coordinated Universal Time): The primary time standard by which the world regulates clocks and time, and to which "transmission time" is referenced.
Synonyms
- Uplink time
- Send time (less formal, in technical contexts)
Related Phrases
- Time of transmission: A more general phrase that can be synonymous with "transmission time."
- To log the transmission time: The action of recording this specific moment.
Noun
-
the coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body
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