Hi all,

I know there are already various topics about this subject, but I am still confused, so I hope someone is able to help me with this.

I downloaded Sentinel 2 images acquired in 2017 from SciHub. Then I used Sen2cor to process the images to L2A. If I understood correct, 2A gives the BOA reflectances as a DC (digital count). When I want to obtain the reflectance, I divide the 2A by 10000 to obtain the reflection between 0 and 1. However, the values are then very small and do not overtop the 30% reflectance. Is this possible?

Also, is it correct to state that L2A values are unitless? So is a Digital Count unitless? Because it is also a measure of reflectance and reflectance is unitless because it represents a relation (thus a relative number and not an absolute number)? So if I decided to present my data in DCs instead of reflectance, can I then say that DC is unitless reflectance?

Once again, apologies for asking about this subject again, but as I said, any help is really appreciated!

Thanks!