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Ocean optics estimation for absorption, backscattering, and phase function parameters.

Ammar H Hakim1, Norman J McCormick

  • 1Department of Mechanical Engineering, Box 352600, University of Washington, Seattle, Washington 98195-2600, USA. ahakim@u.washington.edu

Applied Optics
|March 6, 2003
PubMed
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This study presents an inverse ocean optics method to determine inherent optical properties from radiance measurements. The method accurately estimates coefficients like absorption and scattering, even with limited data.

Area of Science:

  • Ocean Optics
  • Remote Sensing
  • Inherent Optical Properties (IOPs)

Background:

  • Accurate determination of inherent optical properties (IOPs) is crucial for understanding ocean processes.
  • In-situ radiance measurements are a key data source for inferring IOPs.
  • Existing methods may require extensive data or specific conditions.

Purpose of the Study:

  • To develop and validate an inverse ocean optics procedure for determining IOPs.
  • To assess the method's performance using numerically simulated data.
  • To establish a simplified approach for asymptotic radiance regimes.

Main Methods:

  • Utilizing numerically simulated in-water radiance measurements.
  • Applying an inverse procedure to estimate IOPs from radiance data at one or two depths.

Related Experiment Videos

  • Incorporating bottom reflectance measurements for albedo and Lambertian fraction determination.
  • Developing a simplified method using three irradiance measurements.

    • Main Results:

    • Successful estimation of single-scattering albedo and Henyey-Greenstein phase function parameter with single-depth data.
    • Accurate determination of optical thickness, absorption, scattering, and backscattering coefficients with two-depth data.
    • Feasibility of estimating bottom albedo and Lambertian fraction near the seafloor.
    • Validation of a simplified method for asymptotic conditions.

    Conclusions:

    • The proposed inverse method effectively determines key IOPs from radiance measurements.
    • The accuracy of IOP determination is enhanced with increased data depth.
    • The method offers a valuable tool for oceanographic research and optical property assessment.