Hello François, As I wrote to you before, I want to apply the Polymer algorithm to my airborne data, i.e., the CASI-1500 data. So far, I have calculated the parameters for the initial correction of the CASI-1500 reflectance (or radiance). The parameters include the total transmission of ozone (toz),...

Hello François,

Thank you very much for your reply. Do not worry, I know you were busy.

Yes, you're right. I also figured that out.

Kind regards,
Mengmeng.

Hi François, Thank you for your reply. No, I did not divide the output data by π. I visualized the images with SeaDAS and reprojected the data using WGS1994 for both the MODIS L2 data and the output processed by polymer. Before I reprojected the data, the position of the latter data was opposite to ...

Hello François, I processed one MODIS Aqua L1A data by Polymer using the default settings. Then I compared the MODIS Rrs412 images between the standard MODIS L2 data and the output from Polymer using the same color scheme and scale. The two images look very different in terms of the magnitude and di...

Hi Dingky, I have solved that problem. What I did was to install SeaDAS and OCSSW first following this website:https://seadas.gsfc.nasa.gov/tutorials/installation_tutorial/ Then, did this Command Line Configuration: export OCSSWROOT=[SeaDAS_install_dir]/ocssw source $OCSSWROOT/OCSSW_bash.env followi...

Hi François，

I got the L1C_LAC file from l2gen in seadas and I just used make_L1C.py to convert L1A to L1C. Then I ran the polymer algorithm again, it worked. So you are right about the L1C file. Thank you very much for your help!

Kind regards,
Mengmeng.

Hello François,

Thank you! I have made that directory. Then I got another error: KeyError: 'solz'

The variable 'solz' is in 'level1_nasa.py', but I wonder how to fix this error?

Thank you in advance!

Kind regards,
Mengmeng.

Hello! Finally I converted MODISA data from L1A to L1C using l2gen in seadas. Then I ran the polymer algorithm for the L1C data with this code: ./polymer_cli.py A2004102000000.L1C_LAC A2004102000000.polymer.hdf But I got this error: assert isdir(directory), 'Directory {} does not exist. Please creat...

Hello!

When I ran this code "./make_L1C.py A2004102000000.L1A_LAC" to convert MODIS L1A file to L1C, I got an error that "modis_L1B.py: not found".

How to fix this problem? Thank you in advance!

Kind regards,
Mengmeng.

Hello dinky,

I have also installed modis_GEO and l2gen by installing OCSSW in SeaDAS7.5.3 on Ubuntu. But when I ran "./make_L1C.py A2004102000000.L1A_LAC", it said "modis_GEO.py: not found".

How did you fix this problem?

Thank you in advance!
Kind regards,
Mengmeng.