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Prototype development and evaluation of a hyperspectral lidar optical receiving system.

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    This study details an airborne hyperspectral lidar system for Earth observation. It features a novel calibration method, achieving a 400-900 nm spectral range and >3 nm spectral resolution for advanced remote sensing.

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    Area of Science:

    • Earth Observation
    • Remote Sensing Technology
    • Active Sensing

    Background:

    • Airborne hyperspectral lidar integrates lidar 3D data acquisition with hyperspectral imaging.
    • This technology offers high spatial and hyperspectral resolution for Earth surface observation.
    • It represents a significant advancement in remote sensing.

    Purpose of the Study:

    • To introduce the design and development of an airborne hyperspectral imaging lidar system.
    • To propose a fast synchronous calibration method for hyperspectral lidar.
    • To analyze system performance and identify potential issues.

    Main Methods:

    • Utilized a focal plane splitting method with 168 optical fibers.
    • Coupled wide-spectral-range laser echo signals to single-tube detectors.
    • Developed and applied a fast synchronous calibration technique.

    Main Results:

    • Achieved a spectral range of 400-900 nm.
    • Demonstrated a spectral resolution greater than 3 nm for single-fiber detection.
    • Identified and analyzed abnormal detection channels, exemplified by channel 17's spectral bandwidth.

    Conclusions:

    • The developed system meets key design parameters for hyperspectral lidar.
    • The calibration method is effective for system verification and troubleshooting.
    • This research provides a foundation for future airborne flight tests and applications.