I applied bin_spatial to get daily L3 files from QA4ECV NO2 L2 files, for 1 month of data. This went fine.
Then I created a single monthly file using the ‘bin()’ operation as post-operation (-ap) in a harpmerge command. That went fine as well. Note that ‘latitude_bounds_weight’, ‘longitude_bounds_weight’ variables are created in the process, but were initially not present in the daily files.
As a test, I tried a reduce-operation (-ar) instead of a post-operation for the ‘bin()’ to create a monthly file from the daily files. However, then I get as error message
ERROR: products don’t both have variable ‘latitude_bounds_weight’
Even if I do as reduce-operation “exclude(latitude_bounds_weight);exclude(longitude_bounds_weight);bin();” I still get this error message.
Is this a bug? Or is the reduce operation restricted for certain use cases only?