EOPF Toolkit - Notebook Competition winners

[gisromerocandanedo]

Hello! We need the following items from several collections:

• Sentinel-1 Level-1 GRD
• Sentinel-2 Level-2A
• Sentinel-3 SLSTR Level-2 LST

The paths from our 5 notebooks are included:

s3_cnc_winners.txt

Thank you!

[christophreimer]

@senmao can you please check and provide the requested data. please ensure that the data is stored persistently, separated from the current rolling archive.

[senmao]

@gisromerocandanedo The data have been converted with CPM v2.7.0 and are available in EOPF STAC.

@christophreimer The converted data are stored in the notebook-data bucket, which is a long-term bucket for notebook data.

[gisromerocandanedo]

Hello!!! @senmao @christophreimer
Across some of the S2L2A items, we had been getting a recurrent error:

• S2B_MSIL2A_20260222T112109_N0512_R037_T29TQJ_20260222T165721.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2C_MSIL2A_20260224T111051_N0512_R137_T29TQJ_20260224T145311.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2A_MSIL2A_20260219T111621_N0512_R137_T30TUP_20260219T163114.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2A_MSIL2A_20260219T111621_N0512_R137_T29TQJ_20260219T163114.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260219T111009_N0512_R137_T30TUP_20260219T134643.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260219T111009_N0512_R137_T29TQJ_20260219T134643.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2C_MSIL2A_20260214T111151_N0512_R137_T30TUP_20260214T145911.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2C_MSIL2A_20260217T112131_N0512_R037_T30TUP_20260217T150410.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2C_MSIL2A_20260214T111151_N0512_R137_T29TQJ_20260214T145911.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260212T112109_N0512_R037_T30TUP_20260212T151217.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260123T112249_N0511_R037_T30TUP_20260123T133836.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260212T112109_N0512_R037_T29TQJ_20260212T151217.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20260110T111339_N0511_R137_T30TUP_20260110T131623.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2C_MSIL2A_20260118T112411_N0511_R037_T29TQJ_20260118T130309.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20251231T111359_N0511_R137_T30TUP_20251231T134320.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20251231T111359_N0511_R137_T29TQJ_20251231T134320.zarr
  ERROR opening dataset: cannot find any grid mapping in dataset

• S2B_MSIL2A_20250925T112109_N0511_R037_T30TUP_20250925T151904.zarr
  ERROR opening dataset: No group found in store 'https://objects.eodc.eu:443/e05ab01a9d56408d82ac32d69a5aae2a:202509-s02msil2a-eu/25/products/cpm_v256/S2B_MSIL2A_20250925T112109_N0511_R037_T30TUP_20250925T151904.zarr' at path ''

• S2B_MSIL2A_20250925T112109_N0511_R037_T29TQJ_20250925T151904.zarr
  ERROR opening dataset: No group found in store 'https://objects.eodc.eu:443/e05ab01a9d56408d82ac32d69a5aae2a:202509-s02msil2a-eu/25/products/cpm_v256/S2B_MSIL2A_20250925T112109_N0511_R037_T29TQJ_20250925T151904.zarr' at path ''

• S2A_MSIL2A_20260321T112131_N0512_R037_T30TUP_20260321T200016.zarr
  ERROR opening dataset: 504, message='Gateway Time-out', url='https://data.eodc.eu/collections/EOPF_ZARR/products/cpm_v270/S02MSIL2A/2026/03/21/S2A_MSIL2A_20260321T112131_N0512_R037_T30TUP_20260321T200016.zarr/.zgroup'

Just to mention some.

Also, one dev uses the eopf-zarr engine, and theres also a warning that indicates :
ZarrUserWarning: Both zarr.json (Zarr format 3) and .zgroup (Zarr format 2) metadata objects exist at <FsspecStore(HTTPFileSystem, https://data.eodc.eu/collections/EOPF_ZARR/products/cpm_v270/S02MSIL2A/2026/03/21/S2A_MSIL2A_20260321T112131_N0512_R037_T29TQJ_20260321T200016.zarr)>%3E). Zarr format 3 will be used.
warnings.warn(msg, category=ZarrUserWarning, stacklevel=1)

Thank for having a look at this!!!

[gisromerocandanedo]

My bad... But still eopf-zarr in the regular mode as this tutorial:
https://eopf-sample-service.github.io/eopf-sample-notebooks/sentinel-2-analysis/

It's failing!

[gisromerocandanedo]

Hello @senmao
I have a question. Where's the official source of the Sentinel-3 SLSTR Level-2 LST collection?

I looked for the items within the STAC catalog, and pointed the S3 path for .SEN3 from the URL = "https://stac.dataspace.copernicus.eu/v1"
from the 'sentinel-3-sl-2-lst-ntc' collection.
Is that request correct?

[senmao]

@gisromerocandanedo yes, it is correct: the sentinel-3-sl-2-lst-ntc collection. https://browser.stac.dataspace.copernicus.eu/collections/sentinel-3-sl-2-lst-ntc?.language=en