can anyone tell me the reason that why after doing the atmospheric correction of sentinel-2 data using Sen2cor band-8 (842nm) and band-10(1375nm) are vanished though these two are very important for further analysis ??? why is it so and what is the remedy ??? plz help me…
Thank you.
Did you select any output resolution?
Maybe it is worth running sen2cor for 10, 20 and 60 m resolutions as described here_ Sen2Cor-02.05.05-win64 - AttributeError: 'L2A_Tables' Object has no attribute '_L2A_Tile_PVI_File'
atmospheric correction provides bottom-of-atmosphere (or: surface) reflectances. band10, the “cirrus” band, is what is sometimes also called an atmospheric or sounder band. The atmosphere in this spectral region is optically opaque, ie the sensor does not receive signals from the surface but only from the atmosphere itself, hence no surface signal can be inferred.
I am bit confused about which resolution will I select that is why I selected “All” option. Can u guide me about the parameters ? like which resolution should I take, what is the meaning of watermask 0,1,2 etc ???
for band-10 I am agree with u but what about band-8 ? why this is missing ???
Where are you looking at?
If you open the product in SNAP (via the MTD*.xml file), you should have all bands (incl. band10, actually) in the Bands list.
If you are looking into the product folders with a file browser, for option ‘All’, the data is organised into three resolution folders (under GRANULE\L2A_*\IMG_DATA: 60m has all bands except 08 and 10 (that’s maybe where you are looking?), 20m has all except 01, 08, 10, and 10m has only 02-04 and 08.
For reasons to this as well as for the meaning of the masks see the Sen2Cor user guide (available via here) and documentation referred therein.
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I am opening these files in SNAP only with the .xml file. I have attached two pics of before and after sen2cor correction. plz have a look
After correction inside the Granule and image data folder two folders has generated, namely, R20m and R60m. no folder generated like R10m. inside R20m folder 11 band are there except band 1, 8 and 10… where as inside the folder R60 there are 13 bands except band 8 and 10
First, I have to admit I looked at the wrong data in SNAP before. There is no B10 data in the L2A Bands list.
But I do have the B8 there. Odd.
Maybe something went wrong during the processing? Did you keep the error window output (probably re-run) - If you chose resolution ‘all’ (leaving all other params at default, I guess?) and there is no R10m folder, I suspect the processing was finished prematurely for whatever reasons.
Unfortunately I don’t know another way to check what happened afterwards except re-running the case. Or is there a log file with the processing window output somewhere (or an option to redirect that into a file? particularly when running from SNAP)