Hi,
The original download path for the L3e_ozone_omi_**xxxxxxxx**.txt files used by create_omi is no longer available. Currently, only files in HE5 format can be downloaded. How should I correctly generate the files required for the create_omi preprocessing step?
Thank you
There are a couple of potential workarounds.
CMAQv6.0 includes a new OMI file (the output of create_omi) that covers 2005 - 2024 which is available here: CMAQ/CCTM/src/phot/inline/omi_cmaq_2005through2024_27x27.dat at main · USEPA/CMAQ · GitHub
If this covers your time period, then you can use this new file in your application.
If you need create_omi output for a different time period or want a finer resolution OMI file, the input files expected by create_omi are available at a different directory on the ftp site. You can find them here:
Index of /anonftp/toms/omi/Collection3_OLD/data/Level3e/ozone
To download this data, you should be able to update this line in get_toms_data.q from the current line:
wget https://acd-ext.gsfc.nasa.gov/anonftp/toms/omi/data/Level3e/ozone/Y$year/L3e_ozone_omi_"${TODAYG}".txt
to this updated line:
wget https://acd-ext.gsfc.nasa.gov/anonftp/toms/omi/Collection3_OLD/data/Level3e/ozone/Y$year/L3e_ozone_omi_"${TODAYG}".txt
You may also have to add options to your wget command. On our system, this works for me:
wget --secure-protocol=TLSv1_2 https://acd-ext.gsfc.nasa.gov/anonftp/toms/omi/Collection3_OLD/data/Level3e/ozone/Y2024/L3e_ozone_omi_20240101.txt
Hopefully one of those options works for your case.