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...mitters, as opposed to the incoherent [[cavity magnetron]] used on earlier radars, led to the introduction of a new MTI technique. In these systems, the sign ...n terms of the type of clutter and environment: airborne MTI ('''AMTI'''), ground MTI ('''GMTI'''), etc., or may be combined mode: stationary and moving targ ...

...math> (in the figures shown as a red arrow) pointing from the antenna to a ground scatterer. The variables ''u, v, w'' are directional cosines with respect t ...f flight) of a SLAR depends on the length of the transmitted pulse. At the ground of Earth the range resolution has an inverse relationship with the depressi ...

{{Short description|Distance at which ground targets are hidden}} There are a large number of reflectors on the ground at these elevation angles. Prevailing winds of about 15 mile/hour cause the ...

...ed more quickly for higher frequencies. Later missile defense designs used radars operating at higher frequencies in the [[UHF]] and [[microwave]] region to When a nuclear bomb is exploded near ground level, the dense atmosphere interacts with many of the subatomic particles ...

where <math>c</math> is the [[speed of light]] in the medium. Monostatic radars are blind for the duration of the transmit pulse. ...limit the main lobe of the antenna beam so that it does not point near the ground. This is called the low-elevation limit. This creates a blind zone that can ...

...the RAINEX operations center (ROC) at RSMAS during flight in order for the ground team to forecast the development of the tropical cyclone while flight crews ...

...ated crashes occur due to a [[stall (fluid mechanics)|stall]] close to the ground when the pilot gets caught by surprise by a thunderstorm-induced wind shift ...ts are forced to fly by instruments alone, without visual reference of the ground or sky.<ref>{{Cite book ...

...ting radar problem for two functions: permittivity and conductivity of the ground, under the assumption that these functions depend on the vertical coordinat <ref name="r380">A. G. Ramm, Theory of ground-penetrating radars II, Jour of Inverse and Ill-Posed Probl.,6, N6, (1998), 619-624.</ref> ...

...devices, [[sensor|micro-sensors]] and portable [[radar|ground-penetrating radars]] to search for geophysical features. == Ground plane applications == ...

...om [[Interferometry|interferograms]] to achieve an accurate result of real ground displacement.<ref>{{Cite book |last1=Xing |first1=Mengdao |url=https://www. ...here]], which occurs more with larger [[wavelength]]s, such as P or L-band radars, is a consequence of variations in free electron density in the 100–1000&nb ...

...s program. Things changed in the 2000s with the introduction of the US's [[Ground-Based Midcourse Defense]], which led [[Russia]] to reanimate this work. The ...d to keep it out of the sight of the [[US Navy]]'s [[Aegis Combat System]] radars as long as possible, and thereby decrease the time that system has to respo ...

*[[Radar astronomy|radars]] able to measure the distance to other planets beginning in 1961{{sfn|Butr ...on corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.''' 13th CGPM (1967/68, Resolution 1; CR, 103 ...

[[File:High Ground Intercept.jpg|thumb|Concept of a future space interception]] ...nam War]], with Air Force weather and communications spacecraft supporting ground, sea, and air operations.{{sfn|Spires|1998}} During [[Operation Urgent Fury ...