high-frequency direction finding
51Defence Research and Development Organisation — Sanskrit: बलस्य मूलं विज्ञानम् Strength s Origin is in Science [1] Agency overvi …
52Abkürzungen/Luftfahrt/E–K — Dies ist der dritte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E K E …
53OP-20-G — Active July 1, 1922 July 10, 1946 Allegiance United States Branch US Navy Type Code and Signal Section Role Signals intelligence …
54HFWDF — High Frequency Wireless Direction Finding (Anglais. Communément surnommé Huff Duff par les Britanniques et les Américains. En franc., approximativement = Détecteur directionnel d émissions radio à hautes fréquences). Appareil permettant le… …
55Life 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… …
56History 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.… …
57Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
58electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
59Signals 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… …
60Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …
