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Rotational Raman lidar for obtaining aerosol scattering coefficients
1Laboratory for Quantum Optics, Korea Atomic Energy Research Institute, Taejon 305-600, South Korea. dhkim3@kaeri.re.kr
Optics Letters
|August 4, 2005
Summary
A new low-spectral-resolution lidar system accurately retrieves aerosol scattering coefficients. This method bypasses the need for assumptions on aerosol backscattering and extinction relationships or wavelength calibration.
Area of Science:
- Atmospheric Science
- Optical Remote Sensing
Background:
- Aerosol scattering coefficients are crucial for climate and air quality monitoring.
- Traditional methods often rely on high-spectral-resolution lidar (HSRL) and require assumptions or calibration.
Purpose of the Study:
- To develop and validate a novel low-spectral-resolution lidar (LSRL) system.
- To retrieve aerosol scattering coefficients directly from lidar signals without prior assumptions.
Main Methods:
- Utilizing a two-channel lidar system measuring total rotational Raman scattering and elastic signals.
- Developing algorithms to directly calculate aerosol backscattering and extinction coefficients.
Main Results:
- Successfully retrieved aerosol scattering coefficients using the LSRL system.
- Demonstrated that no assumptions regarding the relationship between aerosol backscattering and extinction are needed.
- Showed that wavelength calibration is unnecessary for accurate retrieval.
Conclusions:
- The developed LSRL system offers a simplified and effective approach for aerosol monitoring.
- This technique provides direct measurement capabilities, enhancing the reliability of aerosol optical property retrievals.