'Atmospheric turbulence' diaporamas de présentation

Instrumentation Concepts Ground-based Optical Telescopes

Instrumentation Concepts Ground-based Optical Telescopes. Keith Taylor (IAG/USP) Aug-Nov, 2008. Atmospheric Turbulence (appreciative thanks to USCS/CfAO). Adaptive Optics. Atmospheric Turbulence: Main Points.

800 views • 64 slides

High-resolution optical wave-front sensing and control

High-resolution optical wave-front sensing and control. Eric W. Justh, P. S. Krishnaprasad. Institute for Systems Research University of Maryland, College Park Mikhail Vorontsov, Gary Carhart, Leonid Beresnev Intelligent Optics Laboratory

693 views • 56 slides

AIR POLLUTION AND METEOROLOGY

AIR POLLUTION AND METEOROLOGY. Dr.K . Subramaniam , Senior Lecturer (Environmental Health and Safety ). METEOROLOGY OF AIR POLLUTION. Transport and dispersion Removal mechanisms. Important Aspects of Air Pollution Meteorology. Atmospheric Turbulence

1.08k views • 54 slides

AIR POLLUTION AND METEOROLOGY

AIR POLLUTION AND METEOROLOGY. Dr.K . Subramaniam , Senior Lecturer (Environmental Health and Safety ). METEOROLOGY OF AIR POLLUTION. Transport and dispersion Removal mechanisms. Important Aspects of Air Pollution Meteorology. Atmospheric Turbulence

592 views • 54 slides

Astronomical Observational Techniques and Instrumentation

Astronomical Observational Techniques and Instrumentation. RIT Course Number 1060-771 Professor Don Figer Spatial resolution and field of view, sensitivity and dynamic range. Aims and outline for this lecture. derive resolution and sensitivity requirements for astronomical imaging

655 views • 50 slides

Astronomical Observational Techniques and Instrumentation

Astronomical Observational Techniques and Instrumentation. Professor Don Figer Spatial resolution and field of view, sensitivity and dynamic range. Aims and outline for this lecture. derive resolution and sensitivity requirements for astronomical imaging spatial resolution

504 views • 50 slides

Astronomical Observational Techniques and Instrumentation

Astronomical Observational Techniques and Instrumentation. RIT Course Number 1060-771 Professor Don Figer Spatial resolution and field of view, sensitivity and dynamic range. Aims and outline for this lecture. derive resolution and sensitivity requirements for astronomical imaging

501 views • 50 slides

Vladimir P. Lukin V.E. Zuev Institute of Atmospheric Optics SB RAS,

OUTER SCALE OF TURBULENCE IN THE ANISOTROPIC BOUNDARY LAYER. Vladimir P. Lukin V.E. Zuev Institute of Atmospheric Optics SB RAS, Zuev Sq.,1, 634055, Tomsk, Russia, lukin@iao.ru.

614 views • 47 slides

Alaska Climate Reference Network (AKCRN)

Alaska Climate Reference Network (AKCRN). U.S. Dept. of Commerce National Oceanic & Atmospheric Admin. (NOAA) Office of Oceanic and Atmospheric Research Air Resources Laboratory Atmospheric Turbulence and Diffusion Division 456 S. Illinois Ave Oak Ridge, TN 37830 (865) 576-1233

398 views • 25 slides

X. Tang 1 , Z. Ghassemlooy 1 , S. Rajbhandari 1 , W. O. Popoola 1 and C. G. Lee 2

Performance of the Coherent Optical Binary Polarization-Shift-Keying Heterodyne System In Free Space Optical Communications using a Lognormal Atmospheric Turbulence Model. X. Tang 1 , Z. Ghassemlooy 1 , S. Rajbhandari 1 , W. O. Popoola 1 and C. G. Lee 2

398 views • 24 slides

Introduction Forcings Observations Atmospheric Turbulence Ocean Turbulence Dimensional Analysis

Introduction Forcings Observations Atmospheric Turbulence Ocean Turbulence Dimensional Analysis Basic Equations Length Scales. Convective flows, Rayleigh-Nuselt numbers. Important parameters to consider in unstableflows Rayleigh Taylor Instab. The Atwood Number, A

317 views • 21 slides

The Mauna Kea Weather Center: the need for custom forecasts

The Mauna Kea Weather Center: the need for custom forecasts. Steven Businger, Tiziana Cherubini and R. Lyman. The Mauna Kea Weather Center: the need for custom forecasts. 1 - Forecasts of Observing Quality. Telescope mirror temperature Telescope wind shake Precipitable water

348 views • 19 slides

Atmospheric Profilers

Atmospheric Profilers. Marc Sarazin (European Southern Observatory). List of Themes How to find the ideal site...and keep it good?. Optical Propagation through Turbulence Mechanical and Thermal Index of Refraction Signature on ground based observations Correction methods

256 views • 15 slides

Synthetically Distorted Image Restoration

152 views • 15 slides

High-capacity Optical Communications Using OAM-based Space Division Multiplexing

High-capacity Optical Communications Using OAM-based Space Division Multiplexing. Yongxiong Ren (yongxior@usc.edu) Advisor : Prof. Alan. E Willner Nov. 18th 2016.

167 views • 13 slides

WORDS FOR JOHN

136 views • 13 slides

Atmospheric Turbulence

Atmospheric Turbulence. Atmospheric Turbulence. The atmosphere is an inhomegeneous medium with varying index of refraction in both time and space. thermal gradients humidity gradients bulk wind shear Seeing is the apparent random fluctuation in size and position of a point spread function.

225 views • 11 slides

Tethered Soundings & Profiling

Tethered Soundings & Profiling. Cathryn Birch Ian Brooks. Radiosondes. 6 hourly launches T, p, RH, wind speed and direction Up to about 25km. SkyDoc Balloon. Filled with helium Diameter ~3m (inflated) Volume ~20 m 3 Static lift = 12 kg Dynamic lift = 1 ton @ 45 m s -1

190 views • 9 slides