- 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.
As in ascending above the horizon, for the technical definition, please follow this link to the U.S. Naval Observatory's Astronomical Applications.
Industry:Aerospace
Orbit in which the spacecraft moves in the opposite direction from the planet's rotatation. See prograde.
Industry:Aerospace
The deflection or bending of electromagnetic waves when they pass from one kind of transparent medium into another.
Industry:Aerospace
The deflection or bouncing of electromagnetic waves when they encounter a surface.
Industry:Aerospace
Circular polarization of an electromagnetic wave is a polarization where the tip of the electric field vector, at a fixed point in space, describes a circle as time progresses. If the wave is frozen in time the electric field vectors describe a helix along the direction of propagation. Circular polarization is a limiting case of the more general condition of elliptical polarization.
Industry:Aerospace
Unit of angular measurement equal to the angle at the center of a circle subtended by an arc equal in length to the radius. Equals about 57.296 degrees.
Industry:Aerospace
Quasi-stellar object observed mainly in radio waves. Quasars are extragalactic objects believed to be the very distant centers of active galaxies.
Industry:Aerospace
The unit onboard a spacecraft that provides redundant power conditioning and energy storage, and, upon command, redundant power switching for firing electro-explosive or pyro devices. The PSU has the capability to initiate 34 separate events involving one or more pyro devices..
Industry:Aerospace
Orbit in which the spacecraft moves in the same direction as the planet rotates. See retrograde.
Industry:Aerospace
