SOPhyE satellite data processing technical report series. 1, Ocean colour satellite intercalibration / by Stephanie Clay and Emmanuel Devred. : Fs97-6/3560E-PDF

"Though satellite ocean colour data has massively increased the scope of ocean observations in the past few decades, differences in waveband placement and their spectral response function between satellite sensors lead to inconsistencies between datasets that prevent users from taking advantage of the combined satellite data repository in environmental studies. In this report we examine the spatio-temporal differences between remote-sensing reflectance and chlorophylla concentration products derived from three NASA ocean colour sensors (i.e., MODIS-Aqua, SeaWiFS, and VIIRS-SNPP). We then present a simple method to align SeaWiFS and VIIRS reflectances to MODIS, and derive chlorophyll-a concentration from the modelled bands. These chlorophyll-a concentration estimates are compared to in situ matchups and the effects on spring phytoplankton bloom metrics are examined. The "alignment" method can theoretically be applied to any set of ocean colour sensors in order to generate a common set of wavebands, which could then be merged into a single multi-sensor product for higher spatial and temporal coverage suitable for climate studies"--Abstract, page v.

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