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Humidity and C_n^2 data collected from the Chesapeake Bay area during the 2003/2004 period have been analyzed. We demonstrate that there is an unequivocal correlation between the data during the same time periods, in the absence of solar…

Atmospheric and Oceanic Physics · Physics 2009-11-11 Carlos O. Font , Mark P. J. L. Chang , Eun Oh , Charmaine Gilbreath

We present new optical turbulence structure parameter measurements, C_n^2, over sea water between La Parguera and Magueyes Island (17.6N 67W) on the southwest coast of Puerto Rico. The 600 meter horizontal paths were located approximately…

Atmospheric and Oceanic Physics · Physics 2015-06-26 Mark P. J. L. Chang , Carlos O. Font , G. Charmaine Gilbreath , Eun Oh

Knowledge of the optical refractive index structure parameter $C_n^2$ is of interest for Free Space Optics (FSO) and ground-based optical astronomy, as it depicts the strength of the expected scintillation on the received optical waves.…

Signal Processing · Electrical Eng. & Systems 2023-01-24 Florian Quatresooz , Danielle Vanhoenacker-Janvier , Claude Oestges

The theory of summation of electromagnetic line transitions is used to tabulate the Taylor expansion of the refractive index of humid air over the basic independent parameters (temperature, pressure, humidity, wavelength) in five separate…

Optics · Physics 2007-05-23 Richard J. Mathar

Turbulence is a phenomena that is {\it locally} and statistically characterized by measurements, but it is caused by {\it nonlocal} energy cascades associated with the environment. The presence of turbulence coincides with fluctuations in…

Optics · Physics 2026-05-11 Arial Tolentino , Markus Petters , Luat T. Vuong

The empirical law of Gladstone-Dale is insufficient for high-precision studies using the refractivity of a gas: this is not exactly proportional to its density, and the gas may not be properly described as perfect. An optical Mariotte…

Optics · Physics 2024-03-27 Luc Dettwiller

The effect of temperature and relative humidity on photovoltaics close to river in calabar was studied. A KT-908 precision digital hygrometer and thermometer, and a M890C+ digital multimeter were used in the process. Results obtained shows…

Applied Physics · Physics 2018-08-22 Armstrong O. Njok , Julie C. Ogbulezie

Turbulent fluctuations of the atmospheric refraction index, so-called optical turbulence, can significantly distort propagating laser beams. Therefore, modeling the strength of these fluctuations ($C_n^2$) is highly relevant for the…

Atmospheric and Oceanic Physics · Physics 2023-08-11 Maximilian Pierzyna , Rudolf Saathof , Sukanta Basu

Atmospheric turbulence has a degrading effect on the image quality of long-range observation systems. As a result of various elements such as temperature, wind velocity, humidity, etc., turbulence is characterized by random fluctuations in…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Engin Uzun , Ahmet Anil Dursun , Erdem Akagunduz

Atmospheric optical turbulence seriously limits the performance of high angular resolution instruments. An 8-night campaign of measurements was carried out at the LAMOST site in 2011, to characterize the optical turbulence. Two instruments…

Instrumentation and Methods for Astrophysics · Physics 2015-05-21 L. -Y. Liu , C. Giordano , Y. -Q. Yao , J. Vernin , M. Chadid , H. -S. Wang , J. Yin , Y. -P. Wang

First, we make a revision of the up-to-date Passive Scalar Fields properties: also, the refractive index is among them. Afterwards, we formulated the properties that make the family of `isotropic' fractional Brownian motion (with parameter…

Optics · Physics 2007-05-23 Dario G. Perez

The impact of variable material properties, such as temperature-dependent thermal conductivity and dynamical viscosity, on the dynamics of a fully compressible turbulent convection flow beyond the anelastic limit are studied in the present…

Fluid Dynamics · Physics 2024-07-30 John Panickacheril John , Jörg Schumacher

The Large Binocular Telescope Interferometer uses a near-infrared camera to measure the optical path length variations between the two AO-corrected apertures and provide high-angular resolution observations for all its science channels…

Instrumentation and Methods for Astrophysics · Physics 2016-12-14 D. Defrère , P. Hinz , E. Downey , M. Böhm , W. C. Danchi , O. Durney , S. Ertel , J. M. Hill , W. F. Hoffmann , B. Mennesson , R. Millan-Gabet , M. Montoya , J. -U. Pott , A. Skemer , E. Spalding , J. Stone , A. Vaz

Laboratory results of the optical properties of vapor-deposited water ice, specifically the refractive index and extinction coefficient, are available mainly for a selective set of wavelengths and a limited number of deposition…

Instrumentation and Methods for Astrophysics · Physics 2022-02-09 Jiao He , Sharon J. M. Diamant , Siyu Wang , Haochuan Yu , Will R. M. Rocha , Marina Rachid , Harold Linnartz

Large-scale intermittency is a widely observed phenomenon in convective surface layer turbulence that induces non-Gaussian temperature statistics, while such signature is not observed for velocity signals. Although approaches based on…

Fluid Dynamics · Physics 2021-09-15 Subharthi Chowdhuri , Giovanni Iacobello , Tirtha Banerjee

The amount of water vapor in the terrestrial atmosphere is highly variable both spatially and temporally. In the tropics it sometimes constitutes 4-5% of the atmosphere. At the same time collisional broadening of spectral lines by water…

Atmospheric and Oceanic Physics · Physics 2020-01-08 Yan Tan , Roman V. Kochanov , Laurence S. Rothman , Iouli E. Gordon

Model parametrizations in the convective boundary layer are still at work especially in the interfacial layers with the surface and the free troposphere. The present paper reports simultaneous turbulence-scale lidar observations of wind…

Atmospheric and Oceanic Physics · Physics 2022-11-17 Fabien Gibert , Dimitri Edouart , Paul Monnier , Julie Collignan , Julio Lopez , Claire Cénac

In recent work, Milian-Sanchez et al. observed fluctuations in radioactive decay rate measurement series, and after excluding environmental influences (measured indoors) as root causes, they looked for possible correlations with…

Nuclear Experiment · Physics 2021-08-03 Stefaan Pommé , Krzysztof Pelczar

Numerous weather parameters affect the occurrence and amount of rainfall. Therefore, it is important to study these parameters and their interdependency. In this paper, different weather and time-related variables -- relative humidity,…

Atmospheric and Oceanic Physics · Physics 2018-05-08 Shilpa Manandhar , Soumyabrata Dev , Yee Hui Lee , Stefan Winkler , Yu Song Meng

We report on the amplitude of the density turbulence spectrum ($C_{N}^{2}$) and the density modulation index ($\delta N/N$) in the solar wind between $10$ and $45 R_{\odot}$. We derive these quantities using a structure function that is…

Solar and Stellar Astrophysics · Physics 2017-01-25 K. Sasikumar Raja , Madhusudan Ingale , R. Ramesh , Prasad Subramanian , P. K. Manoharan , P. Janardhan
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