منابع مشابه
Measurement of Atmospheric Turbulence
How light and sound propagate through the optically clear atmosphere has been of interest to children, philosophers, scientists, and engineers since antiquity. The quantum leap in our understanding of wave propagation through the turbulent atmosphere, however, came with the pioneering work by Valeryan Tatarskii and collaborators in the 1950’s and 1960’s. Their work enhanced dramatically our abi...
متن کاملDouble-Star Detection Using Convolutional Neural Network in Atmospheric Turbulence
In this paper, we investigate the usage of machine learning in the detection and recognition of double stars. To do this, numerous images including one star and double stars are simulated. Then, 100 terms of Zernike expansion with random coefficients are considered as aberrations to impose on the aforementioned images. Also, a telescope with a specific aperture is simulated. In this work, two k...
متن کاملThe Atmospheric Wave–Turbulence Jigsaw
It was a huge honour to be asked to give the Marshall Rosenbluth Memorial Lecture. Having never worked on plasma physics, though, I also feel some diffidence! The closest I’ve ever come has been involvement in some peculiar MHD problems that promise an improved understanding of the solar tachocline — more about confining a magnetic field within a plasma than a plasma within a magnetic field. Be...
متن کاملCharacterizing Atmospheric Turbulence with Gps
The Global Positioning System (GPS), originally designed for navigation purposes, has shown its capabilities for use in atmospheric studies for over a decade now (e.g., Bevis et al. 1992). Atmospheric delays of the GPS signals, caused by the atmospheric refractivity along the ray path to a ground-based receiver, are used as tracers of atmospheric densities. The delay caused by the electrically ...
متن کاملQuantifying the Effects of Atmospheric Stability on the Multifractal Spectrum of Turbulence
Over the past decade, several studies suggested possible analogy between price dynamics in the foreign exchange market and atmospheric turbulent flows. Such analogies suggest that applications in business and industry can directly benefit from detailed quantification of the scale-hierarchy existing in fully developed turbulent flows. Numerous studies have already demonstrated the multifractal p...
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ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/167318b0