locating radio receiver
51Arecibo Observatory — Arecibo Radio Telescope Organization SRI International, NSF, Cornell University Location …
52Lovell Telescope — Infobox Telescope name = Lovell Telescope caption = The 76 m Lovell Telescope organization = Jodrell Bank Observatory location = Cheshire, UK coords = coord|53|14|13.2|N|2|18|25.74|W|display=inline,title altitude = wavelength = Up to 5 GHz… …
53Numbers station — Fictional example of a numbers station. Numbers stations (or number stations) are shortwave radio stations of uncertain origin. In the 1950s, Time magazine reported that the numbers stations first appeared shortly after World War II and were… …
54Special reconnaissance — This article is a subset article under Human Intelligence. For a complete hierarchical list of articles, see the intelligence cycle management hierarchy. Special Reconnaissance (SR) is conducted by small units of highly trained military personnel …
55Fermi paradox — The Fermi paradox is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations and the lack of evidence for, or contact with, such civilizations.The extreme age of the universe and its …
56Line-of-sight propagation — refers to electro magnetic radiation including light emissions traveling in a straight line. The rays or waves are diffracted, refracted, reflected, or absorbed by atmosphere and obstructions with material and generally cannot travel over the… …
57The Blitz — London Blitz redirects here. For the London based American football team, see London Blitz (American football). For other uses, see Blitz (disambiguation). The Blitz Part of Second World War, Home Front …
58List of James Bond gadgets — A popular element of the James Bond franchise is the exotic equipment and vehicles he is assigned on his missions, which often prove to be critically useful.The original books and early adaptations had only relatively minimal pieces like the… …
59surveying — /seuhr vay ing/, n. 1. the science or scientific method of making surveys of land. 2. the occupation of one who makes land surveys. 3. the act of one who surveys: The surveying required nearly two days. [1425 75; late ME: act of examining… …
60Anti-submarine weapon — An anti submarine weapon is any one of a range of devices that are intended to act against a submarine, and its crew, to destroy (sink) the vessel or to destroy or reduce its capability as a weapon of war. An anti submarine weapon can be… …
