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Observability-Based Navigation Using Optical and Radiometric Measurements for Asteroid Proximity

机译：基于可观察性的导航使用光学和辐射测量的小行星接近度

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In this article, to improve navigation performance, observability-based navigation using optical and radiometric measurements for asteroid approach phase is proposed in tandem with the optimization of the configuration of spacecraft formation. By introducing the relative range and range-rate between spacecraft measured by radiometric sensors, the position and velocity of the two spacecraft are estimated, and the estimation performance degradation at the end of asteroid approach phase is reduced. A better observability of the integrated navigation system has been proven based on a novel geometry measurement model. Furthermore, a configuration optimization method is developed based on the lower bound of the Cramer-Rao inequality and the observability degree of the navigation system. By optimizing the configuration of spacecraft formation, the observability and estimation accuracy of the navigation system have been improved. Three cases of different configurations of spacecraft formation are established for numerical simulation, demonstrating the improvement in the accuracy of the navigation method.
机译：在本文中，为了改善导航性能，使用光学和辐射测量的基于可观察性的导航，并在串联中提出了航天器形成的配置的串联。通过引入通过辐射传感器测量的航天器之间的相对范围和范围速率，估计两个航天器的位置和速度，并且减少了小行星接近阶段结束时的估计性能降低。基于新型几何测量模型证明了集成导航系统的更好可观察性。此外，基于Cramer-Rao不等式的下限和导航系统的可观察性程度开发了配置优化方法。通过优化航天器形成的配置，导航系统的可观察性和估计准确性得到了改善。建立了三种不同配置的航天器形成的案例，用于数值模拟，展示了导航方法的准确性的提高。

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