The error for the Rayleigh correction of OLCI images

I want to use SNAP 8.0 to do the Rayleigh correction of OLCI images. However, it does not work. The erros is “SEVERE: org.esa.snap.core.dataop.dem.ElevationFile: error in opening zip file
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving”.

   Can you tell me how to solve this problem?

Best Wishes


I think you are not selecting the right input. The zip file you are trying to open in a DEM, not an OLCI L1 product.

I made a test on one band with one OLCI L1 EFR and seems to work properly.

Thank you for your replying.