Do i have to transform Level 2A products into radiance

[Leddow11]

I am wondering if level 2A products after atmospheric corection are in DN.
Because when i load single bands into a remote sensing program i also have values over 1000.
Do i have to transform them into radiance?

[ABraun]

as your data is stored as integers, you need to divide each value by the QUANTIFICATION_VALUE. Please have a look at these topics.

• Are S2 Level 2A products pixel values reflectance?
• The QUANTIFICATION_VALUE has a true value (DN to TOA Reflectance)?
• Quantification_value 1000?
• Extract the quantification values from L2A Sentinel-2
• Comparison between jpg2000 and xml files for Sentinel 2A