[Bug] tropomi_no2_co_nc2ioda.py IndexError

[ashley314]

Current behavior (describe the bug)

When running the ingest suite for tropomi CO for January 5th 2025, the convert throws an error and the entire suite fails.

The command:

python3 /home/ubuntu/skylab/jedi_run/build/bin/tropomi_no2_co_nc2ioda.py -i /home/ubuntu/skylab/jedi_run/workdir/f5092c/20250105T000000Z/obs_tropomi_s5p_co/obs.tropomi_s5p_co.20250105T000000Z.0.nc -o /home/ubuntu/skylab/jedi_run/workdir/f5092c/20250105T000000Z/obs_tropomi_s5p_co/obs.tropomi_s5p_co_total.20250105T000000Z.nc4 -v co -c total -n 0.0 -q 0.5

The error:

Processing variable: carbonmonoxide_total_column
Traceback (most recent call last):
  File "/home/ubuntu/skylab/jedi_run/build/bin/tropomi_no2_co_nc2ioda.py", line 301, in <module>
    main()
  File "/home/ubuntu/skylab/jedi_run/build/bin/tropomi_no2_co_nc2ioda.py", line 297, in main
    writer.BuildIoda(var.outdata, varDims, var.varAttrs, AttrData)
  File "/home/ubuntu/skylab/jedi_run/build/lib/python3.10/pyiodaconv/ioda_conv_engines.py", line 183, in BuildIoda
    ObsVars = self.VerifyDateTime(ObsVars)
  File "/home/ubuntu/skylab/jedi_run/build/lib/python3.10/pyiodaconv/ioda_conv_engines.py", line 168, in VerifyDateTime
    if (isinstance(dtvar[0], str)):
  File "/home/ubuntu/spack-stack-1.7.0/envs/ue-intel-2021.10.0/install/intel/2021.10.0/py-numpy-1.22.3-vvbmdne/lib/python3.10/site-packages/numpy/ma/core.py", line 3222, in __getitem__
    dout = self.data[indx]
IndexError: index 0 is out of bounds for axis 0 with size 0
+ ERROR

To Reproduce

Run skylab's observation ingest suite for tropomi_co using the date of 1/5/25.

Expected behavior

Convert completes or gracefully fails.

Additional information (optional)

[ashley314]

Failing test: https://github.com/JCSDA-internal/skylab/actions/runs/12628873085/job/35185740262

[ashley314]

@BenjaminRuston @jeromebarre I want to make you aware of this issue causing the skylab ingest CI to fail. I am not sure what tags to add or who can address it. Let me know, thanks!