Dear Binbin, You need to provide credentials to NASA EarthData to access ancillary data. As mentioned in the error message: Error authenticating to NASA EarthData for downloading ancillary data. Please provide authentication through .netrc. See more information on https://support.earthdata.nasa.gov/...

Hi, It seems that the download of "auxdata/common/no2_climatology.hdf" has failed, could you try to remove this file and try again ? By the way, there was a letter "i" missing in the filename you mentioned. Concerning the processing of Landsat8 files : * You need to provide a directory name, not a t...

Dear Vishnu, Bitmask is coded in binary, where each bit represents a flag, as coded in bitmask's attributes, from LAND=1=2^0 to INCONSISTENCY=2048=2^11. Thus 2112 = 64+2048 = THICK_AEROSOL+INCONSISTENCY It is recommended to remove pixels where any of the first eleven bits is raised, thus where "bitm...

So, for the record, the patch is: diff --git a/polymer/level1_msi.py b/polymer/level1_msi.py index e2a7b63..c3e1926 100644 --- a/polymer/level1_msi.py +++ b/polymer/level1_msi.py @@ -198,8 +198,8 @@ class Level1_MSI(Level1_base): XDIM = int(e.find('XDIM').text) YDIM = int(e.find('YDIM').text) - X, Y...

Great! Good to read that it solves the issue. I will integrate this modification in further Polymer releases. Just a minor comment: in python3 you would have to use XDIM//2 to stay with integers, XDIM/2 gives a float. But I don't expect that it should affect the results - maybe the performance ? But...

Hi Martin, Thanks for the detailed feedback ! You are right, it is clear Polymer is wrong in how it reads the lats/lons. As you say, the coordinates of the centre of the north east pixel should not be the same at different resolutions. Looking at the code (method init_latlon in level1_msi.py), it is...

I doubt your command has succeeded, because the command should be "make", in the directory containing the makefile, not "make ./polymer4.13/".

The makefile is used by the command "make".

Dear Ding,
You need to compile the program first, using the command "make".
More information can be found in the file README.md.
Cheers,
François

Hi,
I can not provide help about IDLE, but if you provide me with more information about your issue with polymer_cli.py, I would be happy to help.
Cheers,
François