Use of SHOALS bottom reflectance images to constrain the inversion of a hyperspectral radiative transfer model

Grady H. Tuell; Joong Yong Park

doi:10.1117/12.564929

13 September 2004 Use of SHOALS bottom reflectance images to constrain the inversion of a hyperspectral radiative transfer model

Grady H. Tuell, Joong Yong Park

Author Affiliations +

Proceedings Volume 5412, Laser Radar Technology and Applications IX; (2004) https://doi.org/10.1117/12.564929
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

When using airborne passive spectral data for underwater imaging, inversion of radiative transfer models is often based on the simplifying assumptions that spectral diffuse attenuation and path radiance do not vary horizontally across the project area. We have developed a technique which does not require these assumptions. In it, we use a combination of SHOALS pseudoreflectance images and passive spectral images to manually identify areas of homogeneous bottom type. At these locations, we use the measured depths from the SHOALS bathymeter to estimate the spectral diffuse attenuation coefficients, the additive path radiance of the water column, and the bottom radiance (or reflectance) at each homogeneous patch. The parameters estimated at these patches are then used as control points in the interpolation of surfaces for each parameter. In this paper, we show early results using this approach to solve the radiative transfer equations for calibrated radiance data acquired with a casi-2 imaging spectrometer, and describe our procedure for producing SHOALS pseudoreflectance images.

Citation Download Citation

Grady H. Tuell and Joong Yong Park "Use of SHOALS bottom reflectance images to constrain the inversion of a hyperspectral radiative transfer model", Proc. SPIE 5412, Laser Radar Technology and Applications IX, (13 September 2004); https://doi.org/10.1117/12.564929

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