- Industry: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
- Company Profile:
The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
A quantity of data used as the basis for multiplexing, for example in accordance with CCSDS.
Industry:Aerospace
A multiplier, x1015, from the Greek "pente" (five, the "n" is dropped). The reference to five is because this is the fifth multiplier in the series k, M, G, T, P. See the entry for CGPM.
Industry:Aerospace
Elapsed time between Earth and spacecraft or solar system body.
Industry:Aerospace
Configuration in which one celestial body is opposite another in the sky. A planet is in opposition when it is 180 degrees away from the sun as viewed from another planet (such as Earth). For example, Saturn is at opposition when it is directly overhead at midnight on Earth.
Industry:Aerospace
A large number of comets theorized to orbit the sun in the neighborhood of 50,000 AU.
Industry:Aerospace
Communications mode consisting only of downlink received from a spacecraft.
Industry:Aerospace
Modulation scheme in which a phase deviation is held for a period of time in order to represent a data symbol. See Chapter 10.
Industry:Aerospace
A small nodding motion in a rotating body. Earth's nutation has a period of 18.6 years and an amplitude of 9.2 arc seconds.
Industry:Aerospace
