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为解决编队小卫星星间基线指向的测量问题,提出了一种以激光与望远光瞳相结合的星间指向测量方法。建立了以迪卡尔坐标系为基准的星间基线指向测量模型,通过分析待测小卫星相对于基准小卫星空间位置发生改变时,待测小卫星特征点在基准小卫星上投影的改变规律,采用在待测卫星上放置一组空间阵列角锥棱镜的测量方案。对运行于不同半径轨道上的两颗小卫星之间的基线测量进行了仿真,最后通过实验对本文提出的方法进行了验证。实验结果表明,本方法可以实现对星间基线指向的测量,其测量结果的扩展不确定度为7.4′(k=2)。
In order to solve the problem of the baseline pointing measurement of small satellite formation, a method for measuring the inter-satellite point with laser and telephoto pupil is proposed. An inter-satellite baseline pointing measurement model based on the Cartesian coordinate system is established. By analyzing the change rule of the small satellite feature points projected on the reference small satellite when the spatial position of the small satellite relative to the reference small satellite changes, The measurement scheme of placing a set of space array pyramid prisms on the satellite under test is adopted. The baseline measurements between two small satellites operating on different radius orbits are simulated. Finally, the method proposed in this paper is validated by experiments. The experimental results show that this method can measure the baseline orientation of stars, and the extended uncertainty of the measurement results is 7.4 ’(k = 2).