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Related Experiment Video

Updated: Jan 1, 2026

Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring

Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring

Published on: June 13, 2025

Undersea compound radiometer.

W Doss, W Wells

|August 21, 2010

Summary

This summary is machine-generated.

A new undersea radiometer measures radiance moments to calculate scattering functions in natural waters. This method enables real-time, in situ absorption coefficient measurement and scattering function recovery.

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Area of Science:

Ocean optics
Radiative transfer theory
In situ measurements

Background:

Conventional instruments for measuring oceanic optical properties have limitations.
Understanding light scattering and absorption is crucial for marine science.

Purpose of the Study:

To develop a novel undersea radiometer for measuring integral moments of radiance.
To enable the calculation of spherical moments of the scattering function.
To perform real-time, in situ measurements of the absorption coefficient.

Main Methods:

Built a simple undersea radiometer measuring ten integral moments of radiance as a function of depth.
Inverted radiative transfer equations using measured radiance moments.
Collected data in coastal waters near San Diego.
Utilized concurrent attenuation measurements to aid in scattering function recovery.

Main Results:

Successfully measured ten integral moments of radiance in situ.
Calculated nine spherical moments of the scattering function for stratified waters.
Determined the absorption coefficient in real time.
Recovered scattering functions using concurrent attenuation data.

Conclusions:

The developed radiometer provides a new technique for inverting radiative transfer equations.
This method overcomes limitations of conventional optical instruments.
The instrument facilitates in situ determination of key oceanic optical properties like absorption and scattering.