Optimization of Doppler lidar system parameters for the measurement of atmospheric wind speed
| Autor: | S. Veerabuthiran, Jai Paul Dudeja, Mukesh Kumar Jindal, Deepak Dubey |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Accuracy and precision
business.industry Laser Doppler velocimetry Laser Wind speed law.invention symbols.namesake Optics Lidar law Spectral width symbols Astrophysics::Solar and Stellar Astrophysics Environmental science business Doppler effect Laser Doppler vibrometer Physics::Atmospheric and Oceanic Physics Remote sensing |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.696877 |
| Popis: | One of the main functions of a Doppler Lidar system is to measure the atmospheric wind speed and direction. It is done by measuring the Doppler shift in frequency of the backscattered laser beam. A frequency stabilized Nd: YAG laser source operating at its fundamental wavelength of 1064 nm will be used in the proposed incoherent detection system. Edge technique is employed along with a high-resolution optical filter in this system to achieve high accuracy in the measurement of wind velocity. The performance of Doppler lidar system is estimated with realistic parameters. Analysis of the uncertainty in wind measurement is made by considering factors like lidar return signal levels, laser spectral width, etalon filter pass band (FWHM) etc. An accuracy of 0.25 m/s has been achieved in the wind speed up to an altitude of 5 km with 15-m range resolution in the proposed ground based Doppler Lidar system. |
| Databáze: | OpenAIRE |
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