About scaling factor and exporting product etc

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  1. dl means dimensionless. This means value has no unit. DN stands for Digital Number. Also often called as raw data. Often a scaling factor and/or scaling offset needs to be applied before you have geophysical values.
  2. You don’t need to prepare the data for sen2cor. It can handle that data on its own.
  3. This has already been answered in an other post of you. The ENVI data is exported as raw data. In Envi you need to apply these values manually. Or you can create a copy of each band by using the Band Maths. As expression use simply the band name. When you export the copies you have also the geophysical values in ENVI. But the file size will be a lot higher.
  4. I think both images show the same graph. It is just that the range of the y-axis is different. You can press SHIFT while moving the mouse to let the range adjust automatically.
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