Meteorology: Random Listings RSS

PSK

Phase Shift Keying. A form of phase modulation of a data signal performed by a modem for transmission over dedicated wire or phone lines.

Category:Meteorology

A numbering system using a base number of 16 and including the ten decimal digits (0 to 9) along with six alpha digits (A to F). Thus. a digit is available to represent each of the possible values of a 4-bit binary digit.

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A precipitation amount of less than 0.005 inches. Also, the record made by any self-registering instrument.

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Electromagnetic radiation lying in the wavelength interval between 0.8 micron and I millimeter. At the lower limit of this interval, the infrared radiation spectrum is bounded by visible radiation, while on its upper limit it is bounded by microwave radia ...

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Operation mode of a communication circuit in which each end can transmit and receive, but not simultaneously.

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See hurricane beacon.

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An absolute temperature scale with the degree of the Fahrenheit scale and the zero point of the Kelvin scale. The freezing point of water equals 491.69

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A wind blowing in a direction opposite to the heading of a moving object, thus opposing the object's intended progress; the opposite of a tailwind.

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Thermodynamic change of state of a system in which there is transfer of heat across the boundaries of the system. Compare to adiabatic process.

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The limiting values of ceiling, visibility, and wind, or runway visual range, established as safety minimum for aircraft landings and take-offs.

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A device which converts energy from one form into another, i.e. an ac generator transducer which converts the mechanical motion of anemometer cups into an electrical signal.

Category:Meteorology

Same as atmometer.

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Turbulence encountered by aircraft when flying through air space devoid of clouds. Thermals and wind shear are the main causes.

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A type of pressure-plate anemometer in which the plate, restrained by a stiff spring, is held perpendicular to the wind. The wind-activated motion of the plate is measured electrically. The natural frequency of this system can be made high enough so that ...

Category:Meteorology

Snow shower, particularly of a very light and brief nature.

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Temperature to which absolutely dry air would have to be brought in order for it to have the same density as moist air, considered at the same pressure.

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A vent used with pressure sensors to reduce the effect of wind on the pressure inlet. It is normally mounted remotely and connected to the sensor using airtight tubing.

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The humidity transducinu element in a Diamond-Hinman radiosonde. Also called electrolytic strip.

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Rate of wind movement in distance per unit time.

Category:Meteorology

A type of hygrometer which measures the water vapor content of the atmosphere by means of the absorption of vapor by a hygroscopic chemical.

Category:Meteorology