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    Area of Science:

    • Infrared imaging
    • Targeting task performance
    • Climate effects on sensor performance

    Background:

    • Scene contrast temperature (SCT) measures temperature and photon flux variation for visual task performance.
    • Previous research compared midwave infrared (MWIR) and longwave infrared (LWIR) SCT in hot, dry climates.
    • Limited data exists on SCT performance across diverse climatic conditions.

    Purpose of the Study:

    • Compare SCT between MWIR and LWIR systems in hot, dry versus cold, dry climates.
    • Evaluate the impact of climate on infrared sensor performance for targeting tasks.

    Main Methods:

    • Collected SCT data for MWIR and LWIR systems.
    • Compared SCT measurements across hot, dry and cold, dry environmental conditions.
    • Analyzed performance variations based on climate and sensor type.

    Main Results:

    • SCT was generally higher in LWIR systems across most tested conditions.
    • An exception was observed in cold, daylight environments where SCT varied.
    • Climate significantly influences infrared sensor performance metrics.

    Conclusions:

    • LWIR systems demonstrate higher SCT in varied climates, impacting targeting performance.
    • Cold, daylight conditions present unique scenarios for MWIR and LWIR SCT comparison.
    • Understanding climate-specific SCT is crucial for optimizing infrared system deployment.