atmospheric scintillation

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• Scintillation (astronomy) — Scintillation or twinkling are generic terms for rapid variations in apparent brightness or color of a distant luminous object viewed through the atmosphere.If the object lies outside the earth s atmosphere, as in the case of stars and planets,… …   Wikipedia

• Scintillation — can refer to:*Scintillation (astronomy), atmospheric effects which influence astronomical observations *Scintillation (physics), a flash of light produced in certain materials when they absorb ionizing radiation *Scintillation (radar), an… …   Wikipedia

• Atmospheric refraction — is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of altitude. Atmospheric refraction near the ground produces mirages and can make… …   Wikipedia

• scintillation — /sin tl ay sheuhn/, n. 1. the act of scintillating; sparkling. 2. a spark or flash. 3. Astron. the twinkling or tremulous effect of the light of the stars. 4. Meteorol. any small scale twinkling or shimmering of objects that are viewed through… …   Universalium

• David L. Fried — is a scientist, best known for his contributions to optics. Fried described what has come to be known as Fried s seeing diameter, or r0 (usually pronounced r naught). The seeing diameter is effectively a limiting aperture due to atmospheric… …   Wikipedia

• Combined Array for Research in Millimeter-wave Astronomy — The Combined Array for Research in Millimeter wave Astronomy (CARMA) is an astronomical instrument comprising 23 radio telescopes. These telescopes form an astronomical interferometer where all the signals are combined in a purpose built computer …   Wikipedia

• Methods of detecting extrasolar planets — Any planet is an extremely faint light source compared to its parent star. In addition to the intrinsic difficulty of detecting such a faint light source, the light from the parent star causes a glare that washes it out. For those reasons, only a …   Wikipedia

• Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …   Wikipedia

• radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium

• ESEM — stands for environmental scanning electron microscope. This is a scanning electron microscope (SEM) that allows a gaseous environment in the specimen chamber. Whereas all conventional microscopes operate in vacuum, the ESEM has added a new… …   Wikipedia

• Astronomical seeing — Schematic diagram illustrating how optical wavefronts from a distant star may be perturbed by a layer of turbulent mixing in the atmosphere. The vertical scale of the wavefronts plotted is highly exaggerated. Astronomical seeing refers to the… …   Wikipedia