Profile plot Sea surface temperature

Hi everyone, it’s my first time here.

I’m trying to compute a profile plot on sea surface temperature on snap wtih the sentinel 3a data.

Here is the complete name of the file I downloaded:
S3A_SL_2_WST____20201120T205457_20201120T223557_20201122T084552_6059_065_185______MAR_O_NT_003.SEN3

I’ve drawn a line but when I want to select if in the profile plot window using ROI mask or mask manager I can’t select the mask thus I can’t obtain a profile plot.

Could someone help me?

The line is a “geometry”. There is a show/hide geometry button. Just select the geometry and profile plot should use it, but sometimes a geometry drawn by hand has glitches that seem to confuse the profile plot and you won’t get a profile plot. The ROI button is used to mask part of the geometry, it does not select the “transect” (in your case, the “line”) geometry.