I tried downloading a few dozens of Sentinel-2 Level 1C data from the LTA using R package sen2r, which allows me to batch download. However, some granules were downloaded as SAFE.zip files that I can’t extract. Has anyone ever encountered such an issue? Please find some examples of the invalid zip files
here
.
I tried contacting the Copernicus EO support, and they have made some scenes online from their end and the problem was solved for most of the granules. However, I am still curious about what went wrong and what can be done to avoid the issue to occur again.
Thanks!
does the r script work with checksums to grant that the zip files were completely downloaded?
If some cannot be extracted they might not be fully retrieved during the batch download. Have you checked their file sizes compared to others?
I tried unzipping the first in item on your gdrive and it also failed for me - incomplete archive.
Perhaps you can get then files you’re missing from
https://storage.cloud.google.com/gcp-public-data-sentinel-2
instead
That first item would be at the folder:
/tiles/48/P/WA/S2A_MSIL1C_20160130T033002_N0201_R018_T48PWA_20160130T033742.SAFE
Never looked into this myself… there are several possibilities but it is probably safer to check if the archive is valid via a simple integrity check ( “unzip -t”) would do the job in most systems.
I wonder if the interface between the LTA and the Hub has some sort of problem that doesn’t detect incomplete transfers… Anyone else experienced something like this?
I got invalid .zip files for Sentinel-2 LTA. Also having “the same” issue with Sentinel-. In both cases I was using batch downloading using the Copernicus API (wget command at terminal). As you can see in the image, quite a few of the frames give incomplete downloads (too large to just be an error message but too small to be image data e.g. 14MB vs 4GB. Have others experienced this? I have contacted the support desk. Which mirror(s) are others using?
cheers
