MTCI (Envisat vs. S-2)

Hello, I am wondering what is the relationship between MTCI computed on the basis of Envisat and S-2 data? Did S-2 somehow exchange Envisat, using the same formula but different data?
I would be very grateful for the information, unfortunately I couldn’t find any reliable source on that matter.

Yes, MTCI reference is written in the help of the processor (Dash and Curran, 2004), so it is an inheritance from MERIS developments,

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In this paper, it notes that MTCI uses (B6 − B5)/(B5 − B4) in S2.



Thank you very much!