We used to download TOMS/OMI ozone data from https://acd-ext.gsfc.nasa.gov/anonftp/toms/omi/data/ozone/Y2023/, but that directory stopped updating on May 2
I suspect the new data location is https://acdisc.gesdisc.eosdis.nasa.gov/data/Aura_OMI_Level3/OMTO3d.003/ (found via https://disc.gsfc.nasa.gov/datasets/OMTO3d_003/summary) - could someone confirm this or direct me to the right location?
For OMI I see two level3 products: 0.25-degree https://disc.gsfc.nasa.gov/datasets/OMTO3e_003/summary and 1-degree https://disc.gsfc.nasa.gov/datasets/OMTO3d_003/summary
Are there any downsides to using the 0.25-degree product?
The Ozone and Air Quality group at NASA/GSFC now hosts these same files at https://ozoneaq.gsfc.nasa.gov/. Select the OMI - Aura: Global Ozone Data from the Data Download link.
The GES DISC (where I work) archives and distributes the OMI/Aura data as well, but these are in an HDF-EOS5 file format (which can also be opened using netCDF tools/software). Our homepage is https://disc.gsfc.nasa.gov. The links you list are our archive location of the data files, and the dataset landing page respectively. But note the files are not the ASCII formatted files you were using before, they are in HDF-EOS5.
I see that files at https://acd-ext.gsfc.nasa.gov/anonftp/toms/omi/data/ozone/Y2023/ are back too!
What would you would be the best OMI ozone dataset to be ingested into Earth Engine? We don't mind switching to reading HDF5 files if the data there are in some sense better.