I’ve talked to Hans Van Der Woerd. He said that the atmospheric correction is too small by C2RCC. So here the C2RCC should improve.
In the Ocean optics conference paper True color analysis of natural waters with SeaWiFS, MODIS, MERIS and OLCI by SNAP (researchgate.net) on page 4, the blue signal is already discussed as an indication of problems with the AC.
… the estuaries and parts of the Wadden Sea have a very blue color instead of the typical CDOM and silt dominated brown water color, which points to error in the atmospheric correction due to sand banks and nearby land; part of the blue atmospheric radiation is not taken out sufficiently.
Regarding the missing 673 band in polymer.
- Is there an option to enable it as output.
- You could ask Hygeos to make it an output of polymer in there forum Polymer - HYGEOS support forum.
- As a quick fix you could generate a new band by interpolating between band 8 (665) and band 10 (681). Yes, this is scientifically questionable but as a test it might be okay.