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Two-frequency lidar inversion technique.

J F Potter

    Applied Optics
    |May 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new analytical technique for inverting lidar returns was developed. This method accurately determines aerosol extinction profiles and transmittance, crucial for atmospheric research.

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    Area of Science:

    • Atmospheric Science
    • Optical Remote Sensing
    • Lidar Technology

    Background:

    • Lidar (Light Detection and Ranging) is a key remote sensing technology for atmospheric profiling.
    • Inverting lidar returns to accurately determine aerosol properties remains a challenge.
    • Existing methods often rely on simplifying assumptions about atmospheric conditions.

    Purpose of the Study:

    • To propose and validate a novel analytical technique for inverting lidar returns.
    • To determine total transmittance, extinction coefficient ratios, and extinction profiles.
    • To assess the technique's sensitivity to noise in simulated atmospheric data.

    Main Methods:

    • Developed an analytical inversion technique requiring simultaneous lidar returns at two frequencies.

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  • Applied the technique to simulated lidar data representing a uniform aerosol.
  • Assessed the impact of noise by averaging multiple lidar shots.

    • Main Results:

    • The technique successfully determined total transmittance (T), extinction coefficient ratio (k), and extinction profiles.
    • With 100 averaged shots, root-mean-square errors for T and k were 1.93% and 1.54%, respectively.
    • Maximum error in the extinction profile was found to be 6% under tested conditions.

    Conclusions:

    • The proposed lidar inversion technique is effective for analyzing uniform aerosols.
    • Accuracy is highly dependent on the signal-to-noise ratio of the lidar returns.
    • The method shows promise for atmospheric aerosol characterization with potential extensions to include molecular scattering.