spacetelescope/jwst
Dec 2024 – Mar 2026
8 Months active
Languages Used
PythonreStructuredTextrstMarkdownRSTtextAstropyNumpy
Technical Skills
Astronomy SoftwareBug FixData AnalysisData ProcessingDocumentationImage Analysis
David Law
PROFILE
David Law
Worked on the spacetelescope/jwst repository, delivering features and fixes that improved data quality, calibration accuracy, and maintainability in the JWST pipeline. Developed and refactored modules for straylight correction, photometric calibration, and EMI correction, introducing powerlaw-based time-dependent models and robust masking logic. Addressed critical bugs in reference pixel subtraction, adaptive trace modeling, and fringe correction, enhancing reliability for MIRI and NIRCam data. Emphasized code readability, documentation, and regression testing, using Python, Numpy, and Astropy to ensure compatibility and scientific rigor. Collaborated across teams to align configuration and documentation, supporting reproducible workflows and streamlined onboarding for scientific software users.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
39Total
Bugs
5
Commits
39
Features
10
Lines of code
821
Activity Months8
Your Network
63 peopleWork History
March 2026
2 Commits
Mar 1, 2026March 2026: Delivered critical stability improvements for the Adaptive Trace Model (ATM) in the JWST pipeline. This included fixing out-of-bounds indexing, boosting spline fitting accuracy, and strengthening error handling to prevent scaling errors in edge regions. The fixes were implemented via two commits (JP-4035 and JP-4300) with cross-team collaboration, improving data quality and calibration reliability for downstream science.
2 Commits
Mar 1, 2026March 2026: Delivered critical stability improvements for the Adaptive Trace Model (ATM) in the JWST pipeline. This included fixing out-of-bounds indexing, boosting spline fitting accuracy, and strengthening error handling to prevent scaling errors in edge regions. The fixes were implemented via two commits (JP-4035 and JP-4300) with cross-team collaboration, improving data quality and calibration reliability for downstream science.
March 2026
January 2026
1 Commits
Jan 1, 2026January 2026 monthly summary focusing on key accomplishments in the spacetelescope/jwst repository. Focused on stabilizing fringe calibration for MIRI MRS data by delivering a targeted bug fix to the 1D residual fringe correction process. This fix excludes user-defined spectral lines from the fringe signal, ensuring RF corrections are not applied to user masks and improving calibration accuracy for MIRI MRS observations.
January 2026
1 Commits
Jan 1, 2026January 2026 monthly summary focusing on key accomplishments in the spacetelescope/jwst repository. Focused on stabilizing fringe calibration for MIRI MRS data by delivering a targeted bug fix to the 1D residual fringe correction process. This fix excludes user-defined spectral lines from the fringe signal, ensuring RF corrections are not applied to user masks and improving calibration accuracy for MIRI MRS observations.
August 2025
1 Commits • 1 Features
Aug 1, 2025Overview for 2025-08: Delivered a key feature for MRS photometry by implementing powerlaw-based time-dependent corrections in the JWST pipeline. Refactored the photomodule to read/apply coefficients for powerlaw models, replacing the prior exponential-model path. This change improves photometric accuracy and fidelity to updated physical models. No major bugs fixed this month.
1 Commits • 1 Features
Aug 1, 2025Overview for 2025-08: Delivered a key feature for MRS photometry by implementing powerlaw-based time-dependent corrections in the JWST pipeline. Refactored the photomodule to read/apply coefficients for powerlaw models, replacing the prior exponential-model path. This change improves photometric accuracy and fidelity to updated physical models. No major bugs fixed this month.
August 2025
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for spacetelescope/jwst focusing on EMI correction improvements and documentation hygiene.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for spacetelescope/jwst focusing on EMI correction improvements and documentation hygiene.
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 performance summary for spacetelescope/jwst focused on correctness, stability, and maintainability in the JWST calibration pipeline. Delivered a critical fix to the SIRS kernel indexing path to ensure the kernel is applied to the correct portion of data, eliminating erroneous reference pixel corrections in the pipeline and improving calibration accuracy for March observations. The fix was documented with a changelog entry to improve traceability for users and engineers. Conducted code maintenance on optimized_convolution.py, cleaning up the integer division logic to improve readability and reduce the risk of regressions, without altering functionality. These efforts enhance pipeline reliability, observability of changes, and long-term maintainability, delivering tangible business value by improving data quality and developer productivity.
3 Commits • 1 Features
Mar 1, 2025March 2025 performance summary for spacetelescope/jwst focused on correctness, stability, and maintainability in the JWST calibration pipeline. Delivered a critical fix to the SIRS kernel indexing path to ensure the kernel is applied to the correct portion of data, eliminating erroneous reference pixel corrections in the pipeline and improving calibration accuracy for March observations. The fix was documented with a changelog entry to improve traceability for users and engineers. Conducted code maintenance on optimized_convolution.py, cleaning up the integer division logic to improve readability and reduce the risk of regressions, without altering functionality. These efforts enhance pipeline reliability, observability of changes, and long-term maintainability, delivering tangible business value by improving data quality and developer productivity.
March 2025
February 2025
14 Commits • 3 Features
Feb 1, 2025February 2025 focused on delivering robust data quality improvements and expanding the JWST pipeline’s reliability. Key work in straylight mitigation, nuanced data quality masking, and ramp fitting introduced new capabilities and stronger test coverage, yielding cleaner data products and clearer documentation for instrument teams.
February 2025
14 Commits • 3 Features
Feb 1, 2025February 2025 focused on delivering robust data quality improvements and expanding the JWST pipeline’s reliability. Key work in straylight mitigation, nuanced data quality masking, and ramp fitting introduced new capabilities and stronger test coverage, yielding cleaner data products and clearer documentation for instrument teams.
January 2025
10 Commits • 2 Features
Jan 1, 2025Month: 2025-01 — spacetelescope/jwst delivered robustness and documentation improvements across pixel replacement, straylight correction, and CRDS usage. Key outcomes include a NumPy 2.0 compatibility fix for pixel replacement, enhanced straylight correction for MIRI MRS with clarified algorithm and optional residual shower removal, and extensive CRDS/documentation updates to improve guidance and reference data workflows. These changes improve reliability in data processing, reduce operational risk in NumPy 2.0 environments, and enhance maintainability and user onboarding through clearer docs and standards.
10 Commits • 2 Features
Jan 1, 2025Month: 2025-01 — spacetelescope/jwst delivered robustness and documentation improvements across pixel replacement, straylight correction, and CRDS usage. Key outcomes include a NumPy 2.0 compatibility fix for pixel replacement, enhanced straylight correction for MIRI MRS with clarified algorithm and optional residual shower removal, and extensive CRDS/documentation updates to improve guidance and reference data workflows. These changes improve reliability in data processing, reduce operational risk in NumPy 2.0 environments, and enhance maintainability and user onboarding through clearer docs and standards.
January 2025
December 2024
5 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for spacetelescope/jwst pipeline work focused on strengthening data quality, reliability, and test coverage across MIRI and SIRS processing steps. Delivered new parameterization to avoid false positives in jump detection, introduced straylight cleanup for MIRI MRS, and fixed a critical reference pixel subtraction bug with updated tests and changelog. These changes reduce misclassifications, improve straylight handling, and ensure alignment with current reference data (nrca3).
December 2024
5 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for spacetelescope/jwst pipeline work focused on strengthening data quality, reliability, and test coverage across MIRI and SIRS processing steps. Delivered new parameterization to avoid false positives in jump detection, introduced straylight cleanup for MIRI MRS, and fixed a critical reference pixel subtraction bug with updated tests and changelog. These changes reduce misclassifications, improve straylight handling, and ensure alignment with current reference data (nrca3).
Activity
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Quality Metrics
Correctness92.4%
Maintainability93.8%
Architecture91.2%
Performance86.6%
AI Usage20.6%
Skills & Technologies
Programming Languages
AstropyMarkdownNumpyPythonRSTreStructuredTextrsttext
Technical Skills
Astronomy SoftwareAstrophysics SoftwareBug FixBug FixingCode FormattingCode RefactoringConfiguration ManagementData AnalysisData ProcessingData Quality FlaggingData ValidationDocumentationImage AnalysisImage ProcessingNumerical Optimization
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