Angular mil — An angular mil, also mil, is a unit of angle. All versions of the angular mil are approximately the same size as a trigonometric milliradian. Contents 1 History 2 Mathematical principle 3 Use … Wikipedia
radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… … Universalium
AN/FPS-16 — manned space program and the U.S. Air Force. The accuracy of Radar Set AN/FPS 16 is such that the position data obtained from point source targets has azimuth and elevation angular errors of less than 0.1 milliradian (approximately 0.006 degree)… … Wikipedia
Sextant — This article is about the sextant as used for navigation. For the astronomer s sextant, see Sextant (astronomical). : For the history and development of the sextant see Reflecting instruments A sextant is an instrument generally used to measure… … Wikipedia
Gray code — The reflected binary code, also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in only one digit.The reflected binary code was originally designed to prevent spurious output from… … Wikipedia
Radar sensor — Radio detection and ranging (radar) is used to sense angle, range and velocity of (moving) scatterers in the environment [Skolnik, M. I.: Introduction to Radar Systems, 3rd Ed. . McGraw Hill, 2005] [Stimson, G. W.: Introduction to Airborne Radar … Wikipedia
Resolver (electrical) — A resolver is a type of rotary electrical transformer used for measuring degrees of rotation. It is considered an analog device, and has a digital counterpart, the rotary (or pulse) encoder.DescriptionThe most common type of resolver is the… … Wikipedia
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… … Wikipedia
Mariner's astrolabe — Three Mariner s Astrolabes in the Museum of the Forte da Ponta da Bandeira; Lagos, Portugal This article is about the Mariner s astrolabe. For the Planispheric astrolabe, see Astrolabe. The mariner s astrolabe, also called sea astrolabe, was an… … Wikipedia
Naval Space command — Active October 1, 1983 – present Country … Wikipedia