I am new to ENVI and attempting to do a radiometric calibration on Sentinel 2 L1C images. The metadata in the ENVI header shows 0.000 for the gain and offset values of all of the bands. I believe this is why I am getting "no data" when I attempt the radiometric calibration.
Where can I find or calculate the gain and offset values to input them using the "Apply Gain and Offset" tool. I haven't found this information in the metadata, but I probably don't know what to look for.
Thank you!
Hello. Sentinel 2 images have two types, 2A and the other 1C. The 1C image does not need atmospheric correction. If you have downloaded 2A images, the best option for the necessary corrections is to use SNAP software and sen2cor tools. But if you want to use ENVI, you have to enter the bands one by one and then give the information of each band to the image so that the software can read this image, then Layer stacking and use the FLAASH command to correct it. Or you can first open the image in the SNAP software and get the ENVI output and do the rest of the steps there. Or use the excellent explanations of dear Yurii.
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