The original data is not of type float. It is uint6. That’s why it needs to be scaled.
Yes, this is actually mentioned in the help of the processor.
I projected the data using Raster–> Geometric operation–>reprojection. Is there a way to do it using python script? I need to process many Sentinel-3 images and doing it using the GUI is not feasible.
Not only via python but also from the command line: Bulk Processing with GPT
For Python you can have a look here:
Also to the example scripts @antonio19812 provides can be helpful for:
In addition, several samples can be found in the forum