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Related Experiment Videos

Calibration method for multiangle lidar measurements.

Markus Pahlow1, Vladimir A Kovalev, Marc B Parlange

  • 1Department of Geography and Environmental Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA. markus.pahlow@noaa.gov

Applied Optics
|May 18, 2004
PubMed
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A novel two-angle lidar calibration method determines the lidar solution constant, enabling accurate vertical profiles of atmospheric extinction. This approach enhances atmospheric measurements by requiring only local homogeneity for calibration.

Area of Science:

  • Atmospheric Science
  • Optical Remote Sensing
  • Lidar Technology

Background:

  • Accurate calibration of elastic lidar systems is crucial for quantitative atmospheric measurements.
  • Existing two-angle methods often require extensive horizontal homogeneity, limiting their applicability.
  • The lidar solution constant is essential for deriving atmospheric properties like extinction coefficients.

Purpose of the Study:

  • To develop and validate a new, robust method for determining the lidar solution constant using scanning elastic lidar data.
  • To enable relative calibration of lidar scans and improve the calculation of vertical atmospheric extinction profiles.
  • To overcome limitations of previous methods by reducing the requirement for large-scale atmospheric homogeneity.

Main Methods:

Related Experiment Videos

  • A two-angle lidar approach is employed, utilizing signals from at least one pair of elevation angles.
  • A minimization technique replaces traditional linear regression for determining the solution constant.
  • The method accommodates both permanent two-angle operation (time-averaged signals) and processing of 2D lidar scans (arbitrary signal pairs).

    • Main Results:

    • The developed method successfully determines the lidar solution constant from scanning elastic lidar data.
    • Vertical profiles of atmospheric extinction can be accurately calculated post-calibration.
    • Extensive testing with synthetic data confirms the robustness and effectiveness of the calibration technique.

    Conclusions:

    • The new two-angle calibration method provides a reliable tool for elastic lidar systems.
    • It significantly improves the accuracy of atmospheric extinction profile retrievals.
    • The method's reduced homogeneity requirement expands its practical application in diverse atmospheric conditions.