OVIRS part2 notebook fails: FITS HDU index out of range due to data structure change

[jordanpadams]

🐛 Describe the bug

ovirs/part2/find-data-standalone.ipynb fails with IndexError: list index out of range when accessing hdul[2].data. The notebook assumes FITS files have at least 3 HDUs (indices 0, 1, 2), but the actual files retrieved from the PDS do not match this structure.

The notebook already contains a comment acknowledging a version discrepancy between the registry (v10.0) and the SBN node (v11.0), suggesting the data structure has changed.

🕵️ Expected behavior

Notebook reads OVIRS FITS files and produces spectral plots for each detector.

📜 To Reproduce

1. Install requirements-sbn.txt
2. Run notebooks/discipline/sbn/ovirs/part2/find-data-standalone.ipynb
3. Cell plotting hdul[2].data[0, i, :] raises IndexError: list index out of range

⚙️ Fix

Inspect the actual HDU structure of currently available OVIRS FITS files (e.g., print(hdul.info())) and update the HDU index and array slicing to match the current data format.

🖥 Environment Info

• astropy~=7.2.0, Python 3.13.1