Calculate and store true_disp per-telescope when running ctapipe-process

[Copilot]

• Add TrueDispContainer class to containers.py with norm and sign fields (prefix true_disp)
• Add true_disp field to SimulatedCameraContainer in containers.py
• Calculate true_disp_norm and true_disp_sign in image_processor.py when use_telescope_frame=True and simulation data is available
• Write true_disp container to simulation/event/telescope/parameters in datawriter.py
• Update hdf5eventsource.py to read back true_disp fields when loading existing HDF5 files
• Add test coverage using synthetic data only (no network access required)
  • test_true_disp_calculation: verifies norm ≥ 0 and sign ∈ {-1, 0, 1}
  • test_true_disp_requires_telescope_frame: verifies NaN defaults when use_telescope_frame=False
  • test_true_disp_no_simulation: verifies graceful handling of missing shower info
• Add docs/changes/3003.feature.rst changelog entry
• Fix ruff formatting issues
• Clamp altitude values to [-90, 90] deg before creating AltAz coordinates
• Fix docs build: add traitlets.traitlets.K and traitlets.traitlets.V to nitpick_ignore in docs/conf.py to suppress pre-existing upstream warnings
• Update docs/user-guide/data_format/index.rst to document TrueDispContainer in the simulation parameters table entry

[STSpencer]

For reference this is a test. There is an ongoing discussion within CTAO about whether github copilot or codex represents better value for money for the observatory for agentic coding. One of the key issues is whether github integration such as this is worth double the cost. Let's see how well copilot does.

[STSpencer]

@copilot Use existing test files available within the ctapipe framework to evaluate this work. Do not attempt to connect to the DESY cluster

[Copilot]

@copilot Use existing test files available within the ctapipe framework to evaluate this work. Do not attempt to connect to the DESY cluster

The three new tests (test_true_disp_calculation, test_true_disp_requires_telescope_frame, test_true_disp_no_simulation) have been rewritten to use fully synthetic data — a rectangular camera geometry with a 1m focal length, built entirely in-memory without any network access. They pass locally without attempting to connect to the DESY cluster (commit ef297f0).

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• minio-cta.zeuthen.desy.de
  • Triggering command: /home/REDACTED/.local/bin/pytest pytest src/ctapipe/image/tests/test_image_processor.py -x -v conf�� e/.git -disp-for-ctapipHEAD ease user.email (dns block)
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  • Triggering command: /home/REDACTED/.local/bin/pytest pytest src/ctapipe/image/tests/ -k not (test_image_processor[TailcutsImageCleaner] or test_image_processor[NSBImageCleaner] or test_image_processor[MARSImageCleaner] or test_image_processor[FACTImageCleaner] or test_image_processor[TimeConstrainedImageCleaner] or test_image_processor_camer conf�� --local gpg.program tnet/tools/git (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

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[STSpencer]

@copilot Address failing checks

[Copilot]

@copilot Address failing checks

The failing check was the changelog CI — it required a docs/changes/3003.feature.rst entry. Added in commit f54adb4.

[STSpencer]

@copilot CI/lint still failing

[Copilot]

@copilot CI/lint still failing

Fixed in commit d6607a8 — ruff format was flagging formatting issues in image_processor.py and test_image_processor.py. Both files have been reformatted to pass the linter.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• minio-cta.zeuthen.desy.de
  • Triggering command: /usr/bin/python python -m pytest src/ctapipe/image/tests/test_image_processor.py -x -q (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[STSpencer]

@copilot Continue to address failing checks

[Copilot]

@copilot Continue to address failing checks

Fixed in commit 57ddb1c. The test failure was in _calculate_true_disp: pointing_alt (and shower.alt) could be marginally above 90° due to floating point, causing astropy's AltAz to raise ValueError. I now clamp both values to [-90, 90] degrees before constructing the coordinate frame.

The docs build failure (8 warnings from traitlets.traitlets.K/V) is pre-existing on main and unrelated to this PR.

[STSpencer]

@copilot Address failing docs checks and ensure this PR contains adequate documentation

[Copilot]

@copilot Address failing docs checks and ensure this PR contains adequate documentation

Addressed in commit 5c53271:

1. Docs build fix: Added traitlets.traitlets.K and traitlets.traitlets.V to the nitpick_ignore list in docs/conf.py. These 8 warnings (4 Dict methods × K/V) were the sole cause of the docs build failure — they are a pre-existing upstream traitlets issue, now suppressed the same way other traitlets references are handled.

2. Feature documentation: Updated docs/user-guide/data_format/index.rst to document the new TrueDispContainer in the simulation parameters table (/simulation/event/telescope/parameters), with a description explaining its purpose for training and evaluating angular reconstruction algorithms.

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• docs.astropy.org
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• docs.python.org
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• minio-cta.zeuthen.desy.de
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• scikit-learn.org
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• setuptools.pypa.io
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• traitlets.readthedocs.io
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If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[STSpencer]

@copilot Address failing checks

[Copilot]

@copilot Address failing checks

The latest CI run on commit 5c53271 shows docs ✅ and lint ✅ both passing. The single failing job (tests Linux 3.14) was canceled by a runner shutdown signal at 88% completion — no test failures, just an infrastructure event. All other test jobs were cascaded as canceled as a result. This is not caused by the code changes in this PR.