- Industry: Weather
- Number of terms: 60695
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
レーダーやライダーシステム内の一連のパルスからの信号パラメータの推定。考慮信号の位相を用いたコヒーレントな統合は、一貫したレーダーで使用されている間において連続パルスからの信号強度が追加され、支離滅裂な統合は、単純なライダーシステムで使用されています。
Industry:Weather
1. A violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud. When tornadoes do occur without any visible funnel cloud, debris at the surface is usually the indication of the existence of an intense circulation in contact with the ground.
On a local scale, the tornado is the most intense of all atmospheric circulations. Its vortex, typically a few hundred meters in diameter, usually rotates cyclonically (on rare occasions anticyclonically rotating tornadoes have been observed) with wind speeds as low as 18 m s<sup>−1</sup> (40 mph) to wind speeds as high as 135 m s<sup>−1</sup> (300 mph). Wind speeds are sometimes estimated on the basis of wind damage using the Fujita scale. Some tornadoes may also contain secondary vortices (suction vortices). Tornadoes occur on all continents but are most common in the United States, where the average number of reported tornadoes is roughly 1000 per year, with the majority of them on the central plains and in the southeastern states (see Tornado Alley). They can occur throughout the year at any time of day. In the central plains of the United States they are most frequent in spring during the late afternoon. See Also supercell tornado, nonsupercell tornado, gustnado, landspout, waterspout.
2. A violent thundersquall in West Africa and adjacent Atlantic waters.
Industry:Weather
Karadeniz ve Batı Kıyı şiddet kuzeydoğu rüzgarları Rusya'nın İstanbul yakınlarında.
Industry:Weather
Шкала измерения излучения определяется абсолютный стандарт типа Пиргелиометр; теперь заменены радиометрических ссылка на мир.
Industry:Weather
A nondimensional number arising in problems of a rotating viscous fluid. It may appear either as Ω''h''<sup>2</sup>/ν, in which case it equals one-half the square root of the Taylor number, or as Ω''r''<sup>2</sup>/ν, where ''r'' is a suitable radius, ''h'' a representative depth, Ω the absolute angular speed, and ν the kinematic viscosity.
Industry:Weather
1. The number of oscillations per second of the electric and magnetic fields in the radio portion of the electromagnetic spectrum, generally that portion between 10<sup>4</sup> and 10<sup>12</sup> Hz; specifically, the frequency of a given radio carrier wave. 2. In radio or radar, pertaining to a signal at the transmitted or received frequency, as opposed to a signal translated to a different frequency (IF signal) or detected (video signal).
Industry:Weather
Usually, the time required for a pulse to increase from 10% of its final value to 90% of its final value. Rise time is less frequently measured between the 5% and 95% points or the 1% and 99% points. Rise time is used to specify the transient response of an instrument, and is similar to its time constant, relaxation time, or response time, although these latter terms use (1 − ''e''<sup>−1</sup>), or about 63%, as the fractional change in state over which time is measured, beginning at an initial value. For example, if a step increase of 10° is applied to a thermometer registering 0° with a rise time of 50 s, the thermometer would increase from 1° to 9° in 50 s. Note that nothing is specified concerning the time required for the instrument to respond to the first or last 10%. See'' also'' time lag.
Industry:Weather
Usually same as autocorrelation, but occasionally used to designate lagged correlations between two separate series of observations, for example, the correlation between ''x<sub>i</sub>'', and ''y<sub>i''+1</sub> in the series ''x''<sub>1</sub>, ''x''<sub>2</sub>,. . . And ''y''<sub>1</sub>, ''y''<sub>2</sub>,. . . . The serial correlation coefficient is the product- moment correlation coefficient for the lagged correlations or for the correlations between series.
Industry:Weather
