研究目的
To present a summary of the plan for TIRS-2 prelaunch characterization at the component, subsystem, and instrument level for the Landsat 9 mission.
研究成果
The TIRS-2 characterization plan is comprehensive and has been validated through subsystem-level testing, indicating that instrument-level requirements will be met. The team will continue support through delivery and post-launch phases to ensure successful mission outcomes.
研究不足
The paper describes a plan and preliminary results; full instrument-level testing was not completed at the time of writing, and limitations may include uncertainties in radiometric accuracy and potential stray light issues, though design modifications aim to mitigate these.
1：Experimental Design and Method Selection:
The characterization plan involves radiometric, spectral, and spatial response testing using Calibration Ground Support Equipment (CGSE) in thermal vacuum conditions. Methods include component-level stack-up and system-level measurements.
2：Sample Selection and Data Sources:
The TIRS-2 instrument and its components (e.g., detector arrays, filters) are the primary samples, with data derived from controlled calibration sources.
3：List of Experimental Equipment and Materials:
Includes CGSE with Infrared Source Module (IRSM), collimator, steering mirror, monochromator, flood source, and thermal vacuum chamber.
4：Experimental Procedures and Operational Workflow:
Testing conducted in multiple thermal vacuum campaigns (TIPCE-1, TIPCE-2, TIPCE-3) to assess focus, stray light, spatial, and spectral performance. Measurements involve pointing targets to specific image plane locations and using spectral modes.
5：Data Analysis Methods:
Analysis of edge response for spatial metrics, spectral response derivation, and radiometric traceability to NIST standards using uncertainty propagation.
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