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Related Experiment Video

Updated: Jun 12, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

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Refractive turbulence profiling using stellar scintillation and radar wind profiles.

J H Churnside, S F Clifford

|June 12, 2010

Summary

This study infers atmospheric turbulence strength profiles using starlight fluctuations. Analyzing frequency shifts in starlight reveals turbulence at different altitudes, enabling accurate C(2)(n) measurements.

Area of Science:

Astronomy
Atmospheric Science
Optical Engineering

Background:

Spatially filtered starlight fluctuations are influenced by atmospheric refractive turbulence.
Understanding the refractive turbulence strength profile (C(2)(n)) is crucial for astronomical observations and optical systems.
Previous methods for C(2)(n) profiling have limitations in vertical resolution and accuracy.

Purpose of the Study:

To develop a method for inferring the atmospheric refractive turbulence strength profile (C(2)(n)) using starlight fluctuations.
To determine the vertical resolution and accuracy achievable with this new method.

Main Methods:

Analyzing the power spectrum of spatially filtered starlight fluctuations.
Correlating fluctuation frequencies with wind velocity profiles at different atmospheric heights.

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Utilizing the relationship between turbulence-induced phase distortions and C(2)(n).

Main Results:

The C(2)(n) profile can be inferred from starlight fluctuation power spectra and wind velocity data.
Vertical resolution of several hundred meters to approximately one kilometer is achievable.
Turbulence strength measurements with better than 50% accuracy are readily obtainable.

Conclusions:

This method provides a novel approach to measuring atmospheric turbulence profiles.
The technique offers practical advantages for adaptive optics and astronomical site characterization.
Accurate C(2)(n) profiling is essential for mitigating atmospheric distortion effects.