Hey, im having trouble to understand the Level 2A products .
I downloaded those products, and i dont know whether the pixel values are reflectance values ! And if yes are TOA or BOA ? the pixel values as i checked goes like 900, 1000 and so (not between 0 and 1 like reflectance is), like they are multiplied with a coefficient or something !
L2A BOA reflectance are supposed to be generated from Level 1C (TOA reflectance) using the senntinel 2 toolbox.
But when i download the L2A, are TOA reflectance and if i want to convert it to BOA i use the toolbox ?
L1C products -> TOA reflectances
L2A products -> BOA reflectances
In both cases, the pixel stores an integer to save space in the disk. For converting these DNs to the reflectances, you have to apply the quantification value. When you open the product in SNAP, this quantification value is applied automatically, but when you open only a jp2 file, you have to apply this quantification value manually.