This question refers to S5P CH4 data. I went through the Map Sentinel 5p CH4, SO2 and CO Data (Visan) post but couldn’t find what I was looking for.
The CH4 file contains the CH4_column_volume_mixing_ratio_dry_air in ppb. Can this be transformed into a CH4_column_number density in mol/m2? I tried the operation, using derive, but it didn’t work and something tells me that harp is expecting to read CH4_column_volume_mixing_ratio and not CH4_column_volume_mixing_ratio_dry_air.
Can I use the dry_air_column_number_density to convert? I’ll just have to sum it first, since this is a profile, right?
And then it is simple multiplication, as per equation 1 from
Or maybe not?