Hello, apologies for the late reply. Polymer processes the products at the resolution of the level1 products. It provides the spatial coordinates of each pixel, in the same way as level1 products are structured. Polymer does not support the reprojection to another resolution of differrent coordinate...

Hello, and apologies for the late reply. The access to the ERA5 dataset should be working with the latest Polymer master branch. A fix related to the new cdsapi has been implemented in Polymer in late 2024. Please make also sure that you are using an up-to-date version of the cdsapi library. That be...

Hello, apologies for the late reply.

Yes, there have been several attempts to download auxiliary data, but finally the code has been running fine. If no valid auxiliary data were found, the code would not have been able to run.

Kind regards,
François

Hello, Yes, Polymer provides a landmask through the Global Surface Water dataset. You can use it by providing a GSW instance to Level1_MSI through the 'landmask' argument : from polymer.gsw import GSW run_atm_corr(Level1_MSI(..., landmask=GSW(directory='/path/to/gsw_data/')), ...) Make sure that the...

Hi, the path to OLCI products has to be the path to the SEN3 directory, not the Oa01_radiance.nc file.
Cheers, François

Hello, Apologies for the late answer, I have made some changes in example.py which was indeed based on an older version. The fix indicated by wxfei19whu should indeed fix the problem, at least you shouldn't receive an error such as : ImportError: cannot import name 'Level1' from 'polymer.main' These...

Hello Binbin,
Does the system run out of memory when this happens ? I suspect this may be the cause.
In this case you may also check in the script you are using to run Polymer, whether some objects are not released, thus cluttering the memory.
Cheers,
François

Hello, Apologies for the late answer. Which version of cython were you using ? The culprit commit concerns probably the modifications introduced for supporting cython>=3. However I have no experience of using polymer on Mac ; I don't know if using cython on this system may have an impact, and can no...

Hello, Apologies for the late answer and thanks for your feedback. This kind of algorithm unstabilities happen undersome circumstances, here most likely the presence of turbid waters and the grazing sun angles. The flags INCONSISTENCY+ANOMALY_RWMOD_BLUE are not recommended for systematical use for O...

Hello, The "CASE2" flag in Polymer is not dedicated to the detection of case 2 water, but is an internal flag which indicates if the algorithm works in "case 2 mode", which involves a second iteration round, and should be triggered mostly over turbid waters, but not always. This flag also does not i...