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[PDF] Top 20 Atmospheric Turbulence Characterisation Using Scintillation Detection and Ranging

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Atmospheric Turbulence Characterisation Using Scintillation Detection and Ranging

Atmospheric Turbulence Characterisation Using Scintillation Detection and Ranging

... In 2005, measurements were collected using the UC-SCIDAR V2005 system on the 1-m telescope operating at a focal ratio of F/13.5. An observation campaign was conducted by Clare Worley as part of her ASTR480 project ... See full document

356

Study on Turbulence Effects for Beam Propagation in  Turbulent Atmosphere

Study on Turbulence Effects for Beam Propagation in Turbulent Atmosphere

... of atmospheric turbulence on the beam ...the atmospheric turbulence affects the received intensity, resulting in the intensity fluctuations at the receiver ...optical scintillation take ... See full document

5

MAXIMIZED RESULT RATE JOIN ALGORITHM

MAXIMIZED RESULT RATE JOIN ALGORITHM

... of atmospheric turbulence effect on free space optical communication using robust modulation that is dual diffuser modulation (DDM) ...mode detection at the ...differential detection ... See full document

7

Scintillation Index of a Gaussian Schell-Model Beam on Slant Atmospheric Turbulence

Scintillation Index of a Gaussian Schell-Model Beam on Slant Atmospheric Turbulence

... called scintillation, due to perturbations from refractive index ...fluctuations. Scintillation can lead to power losses at the receiver, resulting in lower signal-to- noise ratios and eventually to fading ... See full document

13

Atmospheric scintillation in astronomical photometry

Atmospheric scintillation in astronomical photometry

... the detection of small Kuiper-belt ob- jects within our Solar ...of turbulence cause intensity fluctuations (seen as twinkling by the naked eye) called ...This scintillation, which induces ... See full document

10

Outpost Communication Signal Reduction due to Ionospheric Plasma Turbulence

Outpost Communication Signal Reduction due to Ionospheric Plasma Turbulence

... It has been known that turbulence affects the signal of radio wave thus attenuation occurs. This communication signal attenuation is comparable to frictional damage, since open electrons are produced to hesitate ... See full document

9

Non-Kolmogorov atmospheric turbulence and optical signal propagation

Non-Kolmogorov atmospheric turbulence and optical signal propagation

... on atmospheric inhomogeneities satisfactorily explains various properties of a passing signal (rapid signal fading, drop of antenna power gain, ...of atmospheric inhomo- geneities using this theory, ... See full document

5

A Novel Method for Atmospheric Turbulence Reduction Using DD-DWT Based Image Fusion

A Novel Method for Atmospheric Turbulence Reduction Using DD-DWT Based Image Fusion

... Complex Wavelet Transform to shrink coefficients from the enhanced, noisy image. Always according to data directionality, the shrunk coefficients are mixed with those from the non-enhanced, noise-free image. The output ... See full document

6

Influence of atmospheric turbulence on the propagation of quantum states of light using plane-wave encoding

Influence of atmospheric turbulence on the propagation of quantum states of light using plane-wave encoding

... the turbulence-induced distortion of the wavefront and where we have omitted the overall phase factor ...of turbulence in the phase-screen approximation, which is valid when the turbulence is not too ... See full document

8

Stabilizing Atmospheric Turbulence in a Long Range Surveillance using Dark Channel Prior

Stabilizing Atmospheric Turbulence in a Long Range Surveillance using Dark Channel Prior

... surveillance. Turbulence such as fog or haze is responsible for image ...this turbulence is a challenging problem in video ...this atmospheric turbulence using dual tree complex wavelet ... See full document

5

Simulation of Atmospheric Wave Fronts with Turbulence Intermittency

Simulation of Atmospheric Wave Fronts with Turbulence Intermittency

... The simulation of long-exposure images requires time-evolving phase screens in order to account the evolving structure of the Earth atmosphere. The night-time structure can be approximated by a set of multiple turbulent ... See full document

10

Using an atmospheric turbulence model for the stochastic model of geodetic VLBI data analysis

Using an atmospheric turbulence model for the stochastic model of geodetic VLBI data analysis

... The turbulence-based model is generally suitable for different network geometries and can be used for tradi- tional long baselines as well as for local approaches as the baseline lengths repeatabilities could be ... See full document

14

A Study on atmospheric turbulence with Shearing Interferometer wavefront sensor

A Study on atmospheric turbulence with Shearing Interferometer wavefront sensor

... in turbulence statistics and its range of values are much debated in astronomical ...Kolmogorov turbulence is usually written with infinite outer scale and the effect of infinite outer scales is to reduce ... See full document

9

Trainer aircraft wing aerodynamic analysis considering turbulence at operational speed

Trainer aircraft wing aerodynamic analysis considering turbulence at operational speed

... solved using CFD software to predict and tabulate the lift and drag coefficients at different angle of ...different turbulence models an appropriate turbulence model has to be selected to predict the ... See full document

9

The characterisation of the hydrodynamic loads on tidal turbines due to turbulence

The characterisation of the hydrodynamic loads on tidal turbines due to turbulence

... predicted using the relatively simple transfer function or dynamic-in fl ow models given that they are ...[25] using the scale-model data, demonstrated qualitative agreement, but generally predicted fl ow ... See full document

14

Evaluation of Free Space Optical Communication Link for Moderate Atmospheric Turbulence

Evaluation of Free Space Optical Communication Link for Moderate Atmospheric Turbulence

... . The involvement of humidity to the refractive index fluctuation is not accounted for in Equation 4 because this is negligible at optical wavelengths . Further on the position and time-dependent index of refraction ... See full document

9

Evaluate the Performance of a LDPC Coded FSO System Employing Q-PPM as Modulation Technique

Evaluate the Performance of a LDPC Coded FSO System Employing Q-PPM as Modulation Technique

... encoded using L(n,ki) LDPC encoders of rate Ri=ki/n where n is the codeword length and ki is the dimension (information word length) of the ith component LDPC ...signaling using a Gray mapping ... See full document

5

Image Intensity of a Gaussian Rough-Surface in Atmospheric Turbulence

Image Intensity of a Gaussian Rough-Surface in Atmospheric Turbulence

... target detection and imaging ...of atmospheric optical wave propagation, ...through turbulence, the quality of the image is degraded by turbulence with its associated random refractive-index ... See full document

6

Validation and Application of Wind Profiler Measurements of Atmospheric Turbulence

Validation and Application of Wind Profiler Measurements of Atmospheric Turbulence

... It can be seen from Figure 4.9 that measurements of energy dissipation rates by aircraft agree well with the radar measurements for the order of magnitudes of 10 −6 to approximately 10 −4 W/kg. However, the probability ... See full document

131

Aeroelectric structures and turbulence in the atmospheric boundary layer

Aeroelectric structures and turbulence in the atmospheric boundary layer

... Abstract. Complex electrical measurements with the use of sodar data show that electric field pulsation analysis is use- ful for electrodynamics/turbulence monitoring under differ- ent conditions. In particular, ... See full document

6

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