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    Area of Science:

    • Robotics and Navigation
    • Optical Sensing Technologies
    • Atmospheric Optics

    Background:

    • Sky-bionic polar coordinate navigation is valuable when prior information is unavailable.
    • Previous research focused on daytime conditions, neglecting night-time applications due to noise interference.
    • Starlight and sensor noise significantly impact polarization information at night.

    Purpose of the Study:

    • To develop a navigation system for low-illumination environments at night.
    • To address the challenges of noise and starlight in night-time polarimetric navigation.
    • To achieve stable and accurate heading angle output for autonomous systems.

    Main Methods:

    • Design of a short-wave infrared polarimetric sensor system for night-time atmospheric data acquisition.
    • Development of a noise and starlight removal algorithm based on polarization angle statistics.
    • Extensive outdoor experimentation to validate system performance.

    Main Results:

    • The system successfully acquires atmospheric polarization information in low-light conditions.
    • The proposed algorithm effectively mitigates the effects of starlight and noise.
    • Demonstrated stable and accurate heading angle output with a standard deviation of 0.42° on clear nights.

    Conclusions:

    • The developed short-wave infrared polarimetric sensor system and algorithm provide a viable solution for night-time sky-bionic navigation.
    • This technology enhances navigational capabilities in environments with limited illumination.
    • The system offers a reliable method for obtaining precise heading information autonomously at night.