SNAP plugin to import S2 L2A products from Theia


#1

Hi S2tbx developers,
I have seen in the release notes of SNAP 6.0.1 updates that a MUSCATE reader for Theia L2A products (https://theia.cnes.fr) generated with MAJA has been added. That’s great, thanks for that !

Where could I find some documentation about it ?
Best regards,
Olivier


#2

Just to put my question on top of the list :slight_smile:
@obarrilero, is there any documentation ?
Thanks !
Olivier


#3

Salut Olivier,

sorry for the late reply. The documentation is not yet available, but we have used the product description available in the link below (I am sure that you know it very well). If you are interested in some particular point, please, do not hesitate to ask me and I will try to clarify you how it has been implemented.

https://theia.cnes.fr/atdistrib/rocket/#/help

Some details of the current implementation:

  • they are read both reflectances, with and without the correction of slope effects.
  • the angle bands are generated by using the information in the metadata (similar as it is made in the S2 SAFE reader)
  • the masks are interpreted by using the different bits.
  • they are supported the products downloaded from Theia, but not the output obtained directly by using MAJA.

Of course, any comment or suggestion is welcome. For example, do you think that it would be better to use a property for opening only the reflectances with or without slope correction instead of opening both? Is the reader missing any important information?

Regards,
Omar.


#4

Hi Omar,
I am not much a SNAP user. My intention was to make an announcement of the availability of that plugin on CESBIO’s blog, so that users know this solution is available. I also wanted to include a link to some documentation, but if does not exist, I’ll just make the announcement.
Thanks, anyway !

I think it is OK to open both types of products.
Best regards,
Olivier