Added new tof test data

[laspsandoval]

Change Summary

Overview

Added test data for tof that I recently received + another function.

Deleted Files

• FM45_40P_Phi28p5_BeamCal_LinearScan_phi28.50_theta-0.00_Ultra_Image_Raw_Event_20240207T102746_withFSWcalcs.csv
  • Replaced by new test data.

Updated Files

• ultra_l1b_extended.py
  • Added calculations for coincidence position and "etof"
• conftest.py
  • Filename update
• lookup_utils.py
  • Docstring update
• FM45_Startup1_ULTRA_IMGPARAMS_20240719.csv
  • Parameter update

Testing

• imap_processing/tests/ultra/unit/test_ultra_l1b_extended.py
  • Test ultra_l1b_extended.py
• FM45_40P_Phi28p5_BeamCal_LinearScan_phi28.50_theta-0.00_Ultra_Image_Raw_Event_20240207T102746_withFSWcalcs.csv
  • New test data that includes tof and d values.

[subagonsouth]

Overall, looks good. I would recommend trying to reduce the duplicated code in the new get_coincidence_positions() function.

[subagonsouth]

Thanks for the refactor. This looks good to me. I was also forced to learn that xarray.dataset.isel() is for "index select" instead of my ignorant assumption that it stood for "is element" 🤦