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Smeared star spot location estimation using directional integral method.

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    Image smearing impacts star sensor accuracy. A new directional integral method improves star spot location estimation, enhancing attitude determination reliability for satellites, even in challenging conditions.

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    Area of Science:

    • Spacecraft engineering
    • Astrodynamics
    • Optical sensor technology

    Background:

    • Star sensors are crucial for spacecraft attitude determination.
    • Image smearing degrades star sensor performance and accuracy.
    • Accurate attitude determination is vital for mission success.

    Purpose of the Study:

    • To develop a robust method for high-precision star spot location estimation.
    • To improve the accuracy and reliability of star sensors under image smearing.
    • To address the challenges posed by image smearing in attitude determination.

    Main Methods:

    • A novel directional integral method was proposed.
    • The method focuses on high-precision star spot location estimation.
    • Simulations were conducted using orbit data from a mini-satellite payload.

    Main Results:

    • The proposed directional integral method demonstrated high performance.
    • The method showed good robustness in simulation results.
    • Effective application of the method for attitude determination was indicated.

    Conclusions:

    • The directional integral method effectively mitigates image smearing effects.
    • This technique enhances the accuracy and reliability of star sensor-based attitude determination.
    • The method is suitable for challenging space environments and mini-satellite applications.