spacetelescope/romancal
Dec 2024 – Sep 2025
8 Months active
Languages Used
PythonYAMLrst
Technical Skills
AstronomyAstropyCoordinate SystemsWCSGWCSPipeline Development
Jonathan Eisenhamer
PROFILE
Jonathan Eisenhamer
Over eight months, Eisenhamer engineered core calibration and data processing features for the spacetelescope/romancal repository, focusing on astrometric accuracy, metadata reliability, and robust pipeline workflows. He developed and refactored WCS handling, implemented velocity aberration corrections, and enabled GAIA-aligned WCS persistence to improve downstream data quality. Using Python, Astropy, and YAML, Eisenhamer modernized CI/CD workflows, migrated data dependencies, and enhanced test infrastructure to reduce flakiness and ensure reproducibility. His work included backend and full stack development, command-line tooling, and integration with engineering databases, resulting in scalable, maintainable pipelines that support the Roman Space Telescope’s evolving scientific and engineering requirements.
Overall Statistics
Feature vs Bugs
91%Features
Repository Contributions
22Total
Bugs
1
Commits
22
Features
10
Lines of code
5,861
Activity Months8
Your Network
47 people
Work History
September 2025
1 Commits
Sep 1, 2025September 2025 monthly overview for spacetelescope/romancal focused on strengthening test infrastructure reliability and QA outcomes. The primary effort delivered robustness against engineering DB availability issues, resulting in more stable data retrieval and reduced CI/test flakiness.
1 Commits
Sep 1, 2025September 2025 monthly overview for spacetelescope/romancal focused on strengthening test infrastructure reliability and QA outcomes. The primary effort delivered robustness against engineering DB availability issues, resulting in more stable data retrieval and reduced CI/test flakiness.
September 2025
August 2025
4 Commits • 3 Features
Aug 1, 2025Summary for 2025-08: Focused on strengthening pointing metadata reliability, improving WCS update workflows, and enabling aberration calibration for Roman uncal data. Delivered three core items in romancal: (1) Pointing metadata management and orientation correctness, centralizing updates via update_meta and ensuring pointing quality is PLANNED or CALCULATED based on update success; fixed roll reference calculation to ensure correct celestial orientation. Commits tied to this work include RCAL-1121: Fix missing/mistaken meta assignments and a roll calculation fix. (2) TweakRegStep VO timeout configuration, adding a vo_timeout parameter to configure VO catalog service requests (default 120s, min 0). This improves reliability when interacting with external services. (3) Roman velocity aberration correction script, introducing roman_set_velocity_aberration to compute and update velocity aberration information in Roman uncal data, with accompanying docs, configuration entries, and tests.
August 2025
4 Commits • 3 Features
Aug 1, 2025Summary for 2025-08: Focused on strengthening pointing metadata reliability, improving WCS update workflows, and enabling aberration calibration for Roman uncal data. Delivered three core items in romancal: (1) Pointing metadata management and orientation correctness, centralizing updates via update_meta and ensuring pointing quality is PLANNED or CALCULATED based on update success; fixed roll reference calculation to ensure correct celestial orientation. Commits tied to this work include RCAL-1121: Fix missing/mistaken meta assignments and a roll calculation fix. (2) TweakRegStep VO timeout configuration, adding a vo_timeout parameter to configure VO catalog service requests (default 120s, min 0). This improves reliability when interacting with external services. (3) Roman velocity aberration correction script, introducing roman_set_velocity_aberration to compute and update velocity aberration information in Roman uncal data, with accompanying docs, configuration entries, and tests.
July 2025
1 Commits • 1 Features
Jul 1, 2025Monthly summary for 2025-07 focused on delivering the Roman Observatory Orientation Modules and WCS computations in spacetelescope/romancal. This work establishes the foundation for accurate telescope pointing, robust WCS handling, and data-driven orientation workflows, enabling downstream science pipelines and engineering teams to rely on consistent pointing estimates and updated WCS metadata.
1 Commits • 1 Features
Jul 1, 2025Monthly summary for 2025-07 focused on delivering the Roman Observatory Orientation Modules and WCS computations in spacetelescope/romancal. This work establishes the foundation for accurate telescope pointing, robust WCS handling, and data-driven orientation workflows, enabling downstream science pipelines and engineering teams to rely on consistent pointing estimates and updated WCS metadata.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025: Delivered the L3 PSF Model for Roman Space Telescope data in romancal, refactoring PSF creation to support Level 3 mosaic processing, including scaling, smoothing, and azimuthal averaging, along with dependency updates and tests to ensure robustness of L3 PSF generation.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025: Delivered the L3 PSF Model for Roman Space Telescope data in romancal, refactoring PSF creation to support Level 3 mosaic processing, including scaling, smoothing, and azimuthal averaging, along with dependency updates and tests to ensure robustness of L3 PSF generation.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for romancal: Focused on delivering GAIA-aligned WCS persistence to improve data product reliability and downstream analyses.
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for romancal: Focused on delivering GAIA-aligned WCS persistence to improve data product reliability and downstream analyses.
April 2025
February 2025
12 Commits • 2 Features
Feb 1, 2025February 2025 (2025-02) — romancal monthly summary focused on delivering end-to-end TVAC/FPS data processing and stabilizing data dependencies via a STPSF migration. The work improved data processing reliability, CI/CD resiliency, and reproducibility across environments, enabling faster calibration workflows and business value for the telescope data pipeline.
February 2025
12 Commits • 2 Features
Feb 1, 2025February 2025 (2025-02) — romancal monthly summary focused on delivering end-to-end TVAC/FPS data processing and stabilizing data dependencies via a STPSF migration. The work improved data processing reliability, CI/CD resiliency, and reproducibility across environments, enabling faster calibration workflows and business value for the telescope data pipeline.
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for spacetelescope/romancal: Delivered a major WCS enhancement in the mosaic pipeline by refactoring WCS generation/handling and adding GWCS conversion utilities to streamline skycell-to-WCS transformations. Implemented roundtrip L3 WCS info (wcsinfo) improvements for skycell-based specifications, increasing accuracy and robustness of WCS roundtrip transformations in image mosaics. Updated tests to reflect the new functionality, enabling more reliable mosaics and reducing downstream calibration drift. Commit RCAL-930 Roundtrip L3 wcsinfo especially when skycell specifications are used (#1585): 8422362dc33e0d4b3dc6702274b07c740acda37c. These changes improve data quality and reliability for downstream analysis and enable faster, less error-prone mosaicking workflows.
1 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for spacetelescope/romancal: Delivered a major WCS enhancement in the mosaic pipeline by refactoring WCS generation/handling and adding GWCS conversion utilities to streamline skycell-to-WCS transformations. Implemented roundtrip L3 WCS info (wcsinfo) improvements for skycell-based specifications, increasing accuracy and robustness of WCS roundtrip transformations in image mosaics. Updated tests to reflect the new functionality, enabling more reliable mosaics and reducing downstream calibration drift. Commit RCAL-930 Roundtrip L3 wcsinfo especially when skycell specifications are used (#1585): 8422362dc33e0d4b3dc6702274b07c740acda37c. These changes improve data quality and reliability for downstream analysis and enable faster, less error-prone mosaicking workflows.
January 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for spacetelescope/romancal focusing on WFI WCS velocity aberration correction. Delivered a velocity aberration correction frame and integrated differential velocity aberration (DVA) corrections into the assign_wcs step to improve astrometric accuracy by accounting for observatory motion. The change aligns ROMANCAL's WCS workflow with mission reference frames and enhances cross-matching with reference catalogs for WFI data. Commit RCAL-853 documents the change and provides traceability.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for spacetelescope/romancal focusing on WFI WCS velocity aberration correction. Delivered a velocity aberration correction frame and integrated differential velocity aberration (DVA) corrections into the assign_wcs step to improve astrometric accuracy by accounting for observatory motion. The change aligns ROMANCAL's WCS workflow with mission reference frames and enhances cross-matching with reference catalogs for WFI data. Commit RCAL-853 documents the change and provides traceability.
Activity
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Quality Metrics
Correctness92.4%
Maintainability92.8%
Architecture91.8%
Performance84.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
PythonYAMLrst
Technical Skills
API IntegrationAstronomyAstronomy SoftwareAstropyBackend DevelopmentCI/CDCalibration PipelineCommand-line ToolsCoordinate SystemsData AnalysisData ModelingData ProcessingDatabase InteractionDocumentationError Handling
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