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Hi Lachlan,

OK, I will continue exploring other methods. In any case, thank you for your reply.

Heidi.

Hi Lachlan, Thank you very much for your reply! I am sorry for this confusion. To clarify, my issue is not with negative values in L3 IOP products, but rather with results from my own QAA derivation using L3 Rrs products. Specifically, the total minus water absorption coefficient (anw) derived throu...

Dear Sir or Madam, I am working with Ocean Level-3 Standard Mapped Image Products to derive IOPs using QAA-v6. However, I encountered many negative anw values over open water, especially with wavelength>600 nm. Is there any suggestion how to proceed with these negative values? Kind Regards, Heidi