radar warning line
21D.E.W. line — DEW line or D.E.W. line, Distant Early Warning line, a chain of radar stations across northern Canada, north of the Arctic Circle, designed to give the earliest possible warning of an attack on the United States or Canada by missiles or planes… …
22Distant Early Warning — may refer to: Distant Early Warning Line, a series of radar stations in the Arctic, operated during the Cold War by the United States, Canada, Greenland and Iceland Distant Early Warning (song), a song by the Canadian rock band Rush This… …
23DEW line — noun The Distant Early Warning Line, a series of radar stations, located north of the Arctic Circle and extending from Alaska to Baffin Island, operated by American and Canadian authorities from the late 1950s to the early 1990s to help protect… …
24Early warning radar — An early warning radar is any radar system used primarily for the long range detection of its targets, i.e., allowing defences to be alerted as early as possible before the intruder reaches its target, giving the defences the maximum time in… …
25Tornado warning — A tornado warning is an alert issued by government weather services to warn an area that a tornado may be imminent. It can be issued after either a tornado or funnel cloud has already been spotted, or if there are radar indications that a tornado …
26Pinetree Line — The Pinetree Line was a series of radar stations located across the northern United States and southern Canada at about the 50th parallel, along with a number of other stations located on the Atlantic and Pacific coasts. Run by NORAD (after its… …
27Weather radar — in Norman, Oklahoma with rainshaft …
28Ballistic Missile Early Warning System — The United States Air Force Ballistic Missile Early Warning System (BMEWS) was the first operational ballistic missile detection radar. The original system was built in 1959 and could provide long range warning of a ballistic missile attack over… …
29Over-the-horizon radar — US Navy Relocatable Over the Horizon Radar station Over the horizon radar, or OTH (sometimes also beyond the horizon, or BTH), is a design concept for radar systems to allow them to detect targets at very long ranges, typically up to thousands of …
30Continuous-wave radar — is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects.[1]Continuous wave (CW) radar uses Doppler, which renders the radar immune to interference from… …
