direction finding signal

См. также в других словарях:

• Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… …   Wikipedia

• Amateur radio direction finding — Sport imagesize = 250px caption = A German competitor on a two meter ARDF course. union = International Amateur Radio Union nickname = first = 1950s, in northern and eastern Europe registered = clubs = contact = Non contact team = Individual… …   Wikipedia

• direction finder — direction finding. Radio. a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves. [1910 15] * * * ▪ instrument or  radio direction finder        radio receiver and antenna system for… …   Universalium

• Radio direction finder — Civil Air Patrol members practice using a handheld radio direction finder to locate an emergency locator transmitter …   Wikipedia

• Head direction cells — Many mammals possess head direction (HD) cells: Neurons that are active only when the animal s head points in a specific direction within an environment. These neurons fire at a steady rate (i.e. they do not show adaptation), but show a decrease… …   Wikipedia

• Letter beacon — Signal of letter beacon D on 5137.5 kHz Letter beacons are radio transmissions of uncertain origin, which consist of only a single repeating Morse Code letter. They are also often referred to as: SLB, or Single Letter Beacons SLHFB, or… …   Wikipedia

• Signals intelligence in modern history — This article is a subset article of the article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with signals intelligence in the… …   Wikipedia

• Signals intelligence — SIGINT redirects here. For the UNIX signal, see SIGINT (POSIX). RAF Menwith Hill, a large site in the United Kingdom, part of ECHELON and the UK USA Security Agreement. Signals intelligence (often contracted to SIGINT) is intelligence gathering… …   Wikipedia

• Signals intelligence operational platforms by nation — This article is a subset article under the main article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with current signals… …   Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• 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