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Near-Term Reprocessing: End-User Perspectives on Ocean Color Products

This document outlines a near-term approach for ocean color product reprocessing from the end-user perspective. It highlights key products including A_tot, A_phy, A_gd, BBP, and Chl, emphasizing the accuracy and intercomparison capabilities of these products. The recommended approach is to implement simultaneous inversion, requiring only one wavelength per product due to prescribed spectral shapes. The document stresses the importance of validation and rigorous documentation (ATBD), urging caution before making new products operational, and supports the comparison of Globcolor and Wang-Boss methodologies.

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Near-Term Reprocessing: End-User Perspectives on Ocean Color Products

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  1. A near-term (next reprocessing) end-user perspective…

  2. A near-term (next reprocessing) end-user perspective… • Near-term products: atot, aphy, adg, bbp, Chl • atot is most accurate (essentially sum of aphy and adg, can be done by end-user) • aphy, adg, bbp are good for intercomparison with other methods, and in situ data, they provide information on the environment • Chl… just because • Approach: they give the same thing • Easiest for implementation is the simultaneous inversion (GSM-type) • As a consequence, only 1 wavelength is necessary per data product because of prescribed spectral shapes • Uncertainties: for near-term, Globcolor technique • Encompasses all types of errors • Documentation: must come with ATBD

  3. Longer term • Products • Let’s make sure we have a good validation (in situ or match ups) of any new products before making them “operational” • Let’s not lead end-users astray (they can use l2gen or l3gen to get whatever they want anyway). • Uncertainties • Clear need to compare Globecolor vs Wang-Boss approach on selected datasets • We can build piece by piece “the best algorithm”

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