- 行业: 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.
The process of modifying a radio frequency by shifting its phase, frequency, or amplitude to carry information.
Industry:Aerospace
Small bodies in orbit about the sun which are candidates for falling to Earth or to another planet.
Industry:Aerospace
Rocky or metallic material which has fallen to Earth or to another planet.
Industry:Aerospace
A meteoroid which is in the process of entering Earth's atmosphere. It is called a meteorite after landing.
Industry:Aerospace
Great circles that pass through both the north and south poles, also called lines of longitude.
Industry:Aerospace
Time based on an average of the variations caused by Earth's non-circular orbit. The 24-hour day is based on mean solar time.
Industry:Aerospace
A fundamental property of an object comprising a numerical measure of its inertia; the amount of matter in the object. While an object's mass is constant (ignoring Relativity for this purpose), its weight will vary depending on its location. Mass can only be measured in conjunction with force and acceleration.
Industry:Aerospace
A microwave travelling wave tube amplifier named for its process of Microwave Amplification by Stimulated Emission of Radiation. Compare with Laser. In the Deep Space Network, masers are used as low-noise amplifiers of downlink signals, and also as frequency standards.
Industry:Aerospace
