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Additional question around OBCLOUD hosted Sentinel-3, are the NetCDF's cloud native with Kerchunk compatibility and suitable for use with Xarray time series via OpenDataCube or similar libraries ?

https://projectpythia.org/kerchunk-cookbook/notebooks/generating-references/netcdf/

Regards,

Tisham.

**Summary** When querying the OB_CLOUD STAC API for Sentinel-3A OLCI Level-2 **EFR** (Full Resolution, 300m) collections, the results include **ERR** (Reduced Resolution, 1.2km) granules. This appears to be a cataloguing issue in CMR where ERR products are incorrectly indexed under EFR collection ID...

Hi All, Apologies for the very late follow up. We have been making do by using the Bearer Token auth in the header while making requests from OBCloud and this works. Now we are indexing into our datacube both VIIRS and Sentinel-3 from OBCLOUD, so I am following up to check progress on this issue. If...

Please see OB-Cloud access issue with signed URL's that are returned as redirect with fetching the STAC item using authentication headers. https://ob-cumulus-prod-public.s3.us-west-2.amazonaws.com/JPSS2_VIIRS.20250801T021800.L2.OC.NRT.nc?A-userid=tisham_csiro&X-Amz-Algorithm=AWS4-HMAC-SHA256&...

As indicated in another thread some of the data in OB_CLOUD has access issues from same-region S3 endpoint. Hence having them available via OB_DAAC while cloud access stabilizes is beneficial.

Upon further investigation it seems like this is affecting only workloads accessing OB_CLOUD from Oregon using S3 VPC endpoint for same region access. We have successfully downloaded content from the bucket using local network and from AWS Sydney. We could bypass VPC and fetch via public S3 endpoint...

Also checking on the update for JPSS2 - cmr.earthdata.nasa.gov/stac/OB_CLOUD/collections/VIIRSJ2_L2_IOP_2022.0?.language=en When attempting to download other granules via S3 and the temporary credentials obtained , we get this error from S3 . ``` <Error> <Code>AccessDenied</Code> <Message>User: arn:...

Hi, Thanks for the response, I am migrating and testing my code against the OB_CLOUD STAC API. The STAC Search function does not seem to be compatible with previous OB_DAAC implementation. This query returns non-zero results count in OB_DAAC : https://cmr.earthdata.nasa.gov/stac/OB_DAAC/search?limit...

Hi, Thanks for the update. I can also see that the OB_CLOUD and OB_DAAC STAC endpoints are lagging quiet a bit behind the actual NRT data holdings here : https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Level-2/NOAA20-VIIRS/2025/22-May-2025/ . What sort of latency can I expect from these ? Is th...

Yes, looks like the CORS header is missing at the root level of the STAC catalog. Could it please be added there. Looks like the radiantearth browser can run an internal proxy and inject the headers, so I can access it like this : https://radiantearth.github.io/stac-browser/#/external/cmr.earthdata....