Glows badtime flag

[laspsandoval]

This pull request introduces a new mechanism for flagging histogram bins that are close to UV sources in the GLOWS L1b data processing pipeline. The most important changes are the addition of the flag_uv_source method, integration of this flag into the histogram flag array, and updates to testing and mock data to support and validate this feature.

UV Source Masking Enhancements

• Added the flag_uv_source method to glows_l1b_data.py, which computes a boolean mask identifying bins that are within the angular radius of any UV source, using SPICE geometry and ancillary exclusions data.
• Updated _compute_histogram_flag_array to set the new UV source proximity flag in the histogram flags array, utilizing the flag_uv_source method.
• Introduced the IS_CLOSE_TO_UV_SOURCE flag in GLOWSL1bFlags to represent bins close to UV sources.

Testing and Mock Data Improvements

• Enhanced the mock_ancillary_exclusions fixture to provide deterministic UV source coordinates and masking radii, ensuring reproducible test results.
• Updated test_hist_spice_output to validate the shape and count of bins flagged as close to UV sources, confirming the new masking logic works as expected. [1] [2]

Imports and Code Organization

• Extended imports in glows_l1b_data.py to include SPICE geometry functions used for UV source masking calculations.

These changes collectively improve the accuracy and reliability of UV source masking in GLOWS L1b data processing.# Change Summary

Overview

File changes

Testing

[maxinelasp]

This also completes ticket #2759 - nice! Looks good to me, although I'll admit I'm lost on most of the SPICE work - it might be worth getting a check from Tim on this too. Looks like the test is failing due to a type error, but once that's fixed I'm good with merging!

[subagonsouth]

A couple of suggestions for improvement.

[laspsandoval]

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