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The ENIAC main control panel at the Moore School of Electrical Engineering operated by Betty Jennings and Frances Bilas. The history of numerical weather prediction began in the 1920s through the efforts of Lewis Fry Richardson, who used procedures originally developed by Vilhelm Bjerknes [1] to produce by hand a six-hour forecast for the state of the atmosphere over two points in central ...
Ground-penetrating radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. It is a non-intrusive method of surveying the sub-surface to investigate underground utilities such as concrete, asphalt, metals, pipes, cables or masonry. [ 1 ]
Radio direction finding differs from radar in that only the direction is determined by any one receiver; a radar system usually also gives a distance to the object of interest, as well as direction. By triangulation , the location of a radio source can be determined by measuring its direction from two or more locations.
Sean Patrick Duffy (born October 3, 1971) is an American politician, prosecutor, lobbyist, and reality television personality who is currently a co-host of The Bottom Line on Fox Business, as well as a contributor on Fox News.
Diagram illustrating how isotropic gain is defined. The axes represent power density in watts per square meter. is the radiation pattern of a directive antenna, which radiates a maximum power density of watts per square meter at some given distance from the antenna. The green ball
Surface temperature of Antarctica in winter and summer from the European Centre for Medium-Range Weather Forecasts. The climate of Antarctica is the coldest on Earth.The continent is also extremely dry (it is a desert [1]), averaging 166 mm (6.5 in) of precipitation per year.
[174] [175] On 13 October, Nitze conducted TLAM strikes destroying three Houthi radar sites used in the previous attacks. [176] Back in the Red Sea, Mason experienced a third attack on 15 October with five AShMs. She fired SM-2s and decoys, destroying or neutralizing four missiles. Nitze neutralized the fifth missile with a radar decoy. [175] [177]
Given the results of these running summations, the values N, s 1, s 2 can be used at any time to compute the current value of the running standard deviation: = Where N, as mentioned above, is the size of the set of values (or can also be regarded as s 0).
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