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Related Experiment Video

Updated: Jun 15, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

Dual-frequency Doppler-lidar method of wind measurement.

W L Eberhard, R M Schotland

|March 18, 2010

Summary

A new dual-frequency Doppler-lidar (DFDL) method remotely senses wind using two unlike frequencies. This technique offers resilience to atmospheric turbulence and enables simultaneous measurement of three wind velocity components.

Area of Science:

Atmospheric Science
Optical Remote Sensing

Background:

Remote wind sensing is crucial for meteorological and aviation safety.
Existing Doppler-lidar systems can be affected by atmospheric turbulence and optical aberrations.

Purpose of the Study:

Introduce and validate a novel dual-frequency Doppler-lidar (DFDL) method for remote wind velocity measurement.
Assess the performance and advantages of DFDL compared to existing technologies.

Main Methods:

Superimposing two optical beams of unlike frequencies in the sensed volume.
Analyzing the difference in Doppler shifts of scattered light from aerosols.
Deriving the DFDL signal spectrum and signal-to-noise ratio (SNR) expressions.

Main Results:

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Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

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The DFDL method obtains wind velocity from the differential Doppler shifts.
The technique demonstrates resilience to atmospheric optical imperfections.
Potential for simultaneous measurement of all three wind velocity components was identified.

Conclusions:

Dual-frequency Doppler-lidar (DFDL) presents a robust and versatile approach for remote wind sensing.
DFDL offers significant advantages in challenging atmospheric conditions.
The method holds promise for advanced atmospheric monitoring applications.