POSTER Session 2

A MODULAR OPEN-SOURCE BIO-OPTICAL PYTHON FRAMEWORK FOR FORWARD AND INVERSE MODELING

There are many bio-optical algorithms and many programs for analysis of optical remote sensing imagery through inverse modeling. However, many of these algorithms are not open source or publicly available, difficult to customize, or written in programming languages that are hard to integrate into larger workflows. Inspired by the water color simulator WASI, we created a modular Python framework which includes a suite of multispectral algorithms to derive Chlorophyll and SPM concentrations, and CDOM absorption, lower-level models for absorption, scattering, backscattering, and attenuation, which can be used as singular modules or combined in higher-level functions such as the models of Albert and Mobley (2003), Lee et al. (1999), or Gege (2012). The framework also includes customizable look-up-tables, e.g., for the specific absorption coefficients of different phytoplankton species or benthic substrates. Models can be run in forward and inverse mode, which is realized using the scipy and lmfit packages. Our intention was to provide a suite of easily customizable functions which can be combined in a modular fashion. Here, we present the next iteration of the Python package which includes the bio-optical model of Bi et al. (2023). We also show how the model can be used to simulate datasets, which can then be used to train machine learning algorithms and demonstrate how these tools can be used to analyze spaceborne imaging spectroscopy data.

Marcel Koenig, Brockmann Consult GmbH, Germany, https://orcid.org/0000-0002-7617-888X

Kelly Hondula, Center for Global Discovery and Conservation Science, Arizona State University, USA

Philip Noel, Center for Global Discovery and Conservation Science, Arizona State University, USA

Nicholas R. Vaughn, Center for Global Discovery and Conservation Science, Arizona State University, USA

Dagmar Mueller, Brockmann Consult GmbH, Germany

Kerstin Stelzer, Brockmann Consult GmbH, Germany

Carsten Brockmann, Brockmann Consult GmbH, Germany

Gregory Asner, School of Ocean Futures, Arizona State University, USA

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