Does anyone know the equation for converting Sentinel 2 level 1c products from reflectance to TOA radiance?

I've looked at the Sentinel user guides but can't find anything. I'd rather use ArcGIS than SNAP, if possible.


I've actually just found the equation on the ESA SNAP help section under 'reflectance to radiance algorithm specification'.

If anyone else needs it, I used the following:

radiance = ((pixelValueBandX * cos(incidenceAngle) * solarIrradianceBandX) / (pi * d2)) / 10000

where d2 is 1.0/U

values for incidenceAngle, solarIrradianceBandX and U can be found in the 2 metadata files included in the download.


I think that Level-1C product from Sentinel-2 it's already in TOA reflectance values (source: ESA Level-1C Algorithm)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.