Which Bands I have to use for GEMI index?

Hello everyone,

I work on indices with Sentinel-2 data and I found out a thing that forced me to fill some doubts. For many indices SNAP provides the bands by default and for GEMI index it suggests to use 8A band as NIR. But 8A is a Vegetation Red Edge band. NIR band is 8. So, I wonder if it’s a mistake and I have to use Band 8 for GEMI, or SNAP knows what to do and I have to use 8A.

Thank you!


the band 8A is also a NIR band, but I do not know which of them is the most appropiated. SNAP provides by default the 8A because its central wavelength is the closest to 900 nm.


Thank you!