Help on Sentinel File name convention

Optical Toolbox
#1

Hi all,

I am new to Sentinel and have noticed that I have downloaded 2 scenes from EarthExplorer with different file name convention. The files where downloaded from EarthExplorer.

The file names (after extracted):

  • S2B_MSIL1C_20180308T083759_N0206_R064_T34LDQ_20180308T122314.SAFE;
  • S2A_OPER_PRD_MSIL1C_PDMC_20160802T185255_R064_V20160731T090033_20160731T090033.SAFE;

I know I need an L1C scene with TOA reflectance data in order to run the sen2cor plugin over SNAP for atmospheric correction in order to obtain a corrected BOA reflectance file. Is this correct?

So my question is:

  • Which of this scenes is the L1C data?
  • If both are L1C, why the difference on nomenclature?
  • If just one of them is L1C… what about the other file?

Thank you in advance

Regards

Paulo

#2

Both are L1C files. The nameing convention has changed in between. Sen2Cor can handle both, as far as I know.

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#3

Hi Paulo,

Both of your files are L1C. One is from S2A and one from S2B.

The nomenclature of Sentinel 2 products was changed to overcome the limitation on the number of characters in pathnames that is a ‘feature’ of Windows.

The filenaming convention changed as of the 6th of December, 2016. You can find more information here:
https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi/naming-convention

Sen2Cor works on both, for me.

Cheers

Jan

Jan Jackson

S2 MPC/CC Operations Manager

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#4

HI Jan,

Thanks for the update.
Both files are also working on my side and just wanted to understand why the difference on names.

Best regards

Paulo

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