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Sentinel-2 Level-1C images are available in this AWS bucket. I am trying to get a Sentinel-2 L1C image of an area with an atmospheric correction done by the C2RCC Processor. I try to do this using SNAP Desktop.

My question: how do I get Sentinel-2 L1C C2RCC processed images - ie how do I fix the attempt below?


I downloaded one of them, using the command:

aws s3 cp s3://sentinel-s2-l1c/tiles/39/R/WJ/2020/8/22/0/B04.jp2 L1C/B04.jp2 --request-payer requester

Then, opened SNAP Desktop, clicked the open folder "Open Product" symbol on the top left, gave the path of my B04.jp2 image. After loading, I can view the image:

enter image description here

If I then select Optical from the top menu bar, then Thematic Water Processing -> C2RCC Processors -> S2-MSI, I get:

enter image description here

After clicking Run, I get:

enter image description here

Relying on this message, I click Optical -> Geometric -> S2 Resampling Processor. I get:

enter image description here

click Run, result:

enter image description here


EDIT

Following comments, I realize I need a .safe file. To get one, I do:

aws s3 ls s3://sentinel-s2-l1c/products/2020/10/30/S2B_MSIL1C_20201030T235749_N0209_R030_T57MVN_20201031T010920/ --request-payer requester

(The choice of date is not important.) This returns:

                       PRE datastrip/

2020-10-31 03:44:30 18953 inspire.xml 2020-10-31 03:44:30 73519 manifest.safe 2020-10-31 03:44:30 44305 metadata.xml 2020-10-31 03:44:31 1039 productInfo.json

manifest.safe has the extension we want. Download:

aws s3 cp s3://sentinel-s2-l1c/products/2020/10/30/S2B_MSIL1C_20201030T235749_N0209_R030_T57MVN_20201031T010920/manifest.safe manifest.safe --request-payer requester

When I try to open this file using SNAP, I get:

enter image description here

which is not entirely unexpected given that this site says:

manifest.safe file [...] holds the general product information in XML

So I don't know how to open a .safe file and have a viewable image in SNAP as a result.

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  • Have you tried pointing it at a .SAFE folder, rather than a specific band? Jan 25, 2022 at 9:59
  • No. Looking up what .SAFE folder means...
    – zabop
    Jan 25, 2022 at 10:01
  • It is the full & raw S2 file structure. All of the bands and the metadata in the correct organization. Jan 25, 2022 at 10:02
  • Oh ok. Thank you. So If I copy all the files to a directory from s3://sentinel-s2-l1c/tiles/39/R/WJ/2020/8/22/0/, that will be a SAFE folder containing measurements from 2020.08.22, about the area specified by the 39/R/WJ part of the filename - is this understanding of .SAFE files correct?
    – zabop
    Jan 25, 2022 at 10:10
  • I tried what I said above, I was wrong.
    – zabop
    Jan 25, 2022 at 10:29

1 Answer 1

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The C2RCC requires all the bands resampled by S2Resample before processing. In the S2Resample I/O window, select MTD_MSIL1C.xml file from the .SAFE folder of Sentinel-2 product you are processing. It will import all the bands and the required metadata.

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