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Updated: Dec 31, 2025

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

The mutual scattering cross section.

Darrell Jackson¹, Dajun Tang¹

¹Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA.

The Journal of the Acoustical Society of America

|January 3, 2020

Summary

A new mutual scattering cross section is introduced for sonar applications. This method efficiently models reverberation intensity, including interference effects and backscattering enhancement in complex ocean environments.

Area of Science:

Acoustics
Oceanography
Signal Processing

Background:

Conventional scattering cross sections have limitations in complex environments.
Modeling reverberation intensity in ocean waveguides requires advanced approaches.

Purpose of the Study:

Introduce a generalized mutual scattering cross section for sonar.
Apply this new method to analyze sea-surface, seafloor scattering, and multipathing effects.

Main Methods:

Developed a generalized mutual scattering cross section.
Applied the method to analyze large arrays and multipath environments in ocean waveguides.
Derived expressions for seafloor roughness and sediment volume scattering.

Main Results:

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The mutual scattering cross section efficiently models reverberation intensity time series.
It accurately captures interference effects causing oscillations in reverberation.
Models backscattering enhancement due to multipathing, a phenomenon missed by simpler models.

Conclusions:

The mutual scattering cross section offers an efficient and physically based approach for sonar modeling.
It provides a significant advancement over previous ad hoc methods for reverberation analysis.
The method is applicable to various scattering scenarios, including sea-surface and seafloor interactions.