Azimuth: While this term is frequently used for bearing in radar applications, the term azimuth is usually restricted to the direction of celestial bodies among marine navigators.

 

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Azimuth: This refers to the horizontal direction of a satellite. It would have a different azimuth in Los Angeles than in Chicago. Since the satellite is over the equator, if you live in the US, it w . . . View Full Definition

Magnetic Azimuth: Azimuth reckoned from the magnetic north or magnetic south. See magnetic direction.

Astigmatism(Axial): an electron-optical lens aberration that causes the defocus to be a function of azimuth, and the contrast transfer function to deviate from circular symmetry about the optical axis. As a con . . . View Full Definition

Power Spectrum: intensity [= squared amplitude] of the Fourier transform, presented either in the form of an image (= the outcome of the PW operation) or as a profile (= the outcome of averaging the 2D powe . . . View Full Definition

Bearing: Rollers and balls placed between moving parts to reduce friction and wear.

VHF OmniRange (VOR): A ground-based navigation aid transmitting very high-frequency (VHF) navigation signals 360° in azimuth, on radials oriented from MAGNETIC NORTH. The VOR periodically identifies itself by Mo . . . View Full Definition

Unstabilized Display (Heading-Upward): A ppi display in which the orientation of the relative motion presentation is set to ship's heading and, thus, changes with changes in ship's heading. In this heading upward display, radar e . . . View Full Definition

Subshell: A set of electrons with the same azimuthal quantum number. The number of electrons permitted in a subshell is equal to 2ell + 1.

Plan Position Indicator: Also known as a PPI Scope, it is a radar indicator scope displaying range and azimuth of targets in polar coordinates.

Radarsonde Observation: An upper air observation used to determine winds and other meteorological data, by tracking the range, elevation, and azimuth of a radar target carried aloft. A type of rawinsonde.