Space flight

Space flight

Of or relating to the act of voyaging outside the Earth's atmosphere and into outer space, and the science involved in achieving it.

Industry: Aerospace

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Space flight

Universal time (UT)

Aerospace; Space flight

Also called Zulu (Z) time, previously Greenwich Mean Time. UT is based on the imaginary "mean sun," which averages out the effects on the length of the solar day caused by Earth's slightly ...

Travelling wave tube amplifier (TWTA)

Aerospace; Space flight

Downlink power amplifier in a spacecraft telecommunications subsystem, the final stage of amplification for downlink (same unit as TWT).

Downlink power amplifier in a spacecraft used to amplify radio frequency signals to high power, usually in an electronic assembly known as a traveling-wave tube amplifier (TWTA). Telecommunications ...

Two-way non-coherent mode (TWNC)

Aerospace; Space flight

Describing a spacecraft's downlink is not based upon a received uplink from DSN.

Ultraviolet (UV)

Aerospace; Space flight

Literally means "above violet" radiation. Electromagnetic radiation in the neighbourhood of 100 nanometers wavelength.

Coordinated universal time (UTC)

Aerospace; Space flight

The world-wide scientific standard of timekeeping. It is based upon carefully maintained atomic clocks and is highly stable. Its rate does not change by more than about 100 picoseconds per day. The ...