Archives: Glossary Terms: 691 terms

Seventh planet from the sun, a gas giant or Jovian planet.

Ultra Stable Oscillator, in a spacecraft telecommunications subsystem.

Universal Time, also called Zulu (Z) time, previously Greenwich Mean Time. UT is based on the imaginary "mean sun," which ...

The world-wide scientific standard of timekeeping. It is based upon carefully maintained atomic clocks and is highly stable. Its rate ...

Ultraviolet (meaning "above violet") radiation. Electromagnetic radiation in the neighborhood of 100 nanometers wavelength.

DSN Microwave subsystem in DSSs which includes waveguides, waveguide switches, LNAs, polarization filters, etc.

Radiation zones of charged particles that surround the Earth. The shape of the Van Allen belts is determined by the ...

A star that fluctuates in brightness. These include eclipsing binaries.

A vector quantity whose magnitude is a body's speed and whose direction is the body's direction of motion.

Second planet from the sun, a terrestrial planet.