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arXiv 2602.14166astro-ph.IM
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在轨演示X射线脉冲星导航与NinjaSat

In-orbit Demonstration of X-ray Pulsar Navigation with NinjaSat

Graduate School of Advanced Science and Engineering, Hiroshima University（广岛大学先进理工学研究科）；RIKEN Pioneering Research Institute（理化学研究所先锋研究本部）；International Center for Hadron Astrophysics, Chiba University（千叶大学强子天体物理学国际中心）；Department of Physics, Tokyo Metropolitan University（东京都立大学物理学系）；Department of Physics, National Changhua University of Education（国立彰化师范大学物理学系）；Rikkyo University（立教大学）；Department of Earth and Space Science, The University of Osaka（大阪大学地球惑星科学系）
Naoyuki Ota, Takuya Takahashi, Toru Tamagawa, Tomoshi Takeda, Teruaki Enoto, Takao Kitaguchi, Wataru Iwakiri, Yo Kato, Masaki Numazawa, Tatehiro Mihara, Hiromit… 展开作者

Naoyuki Ota, Takuya Takahashi, Toru Tamagawa, Tomoshi Takeda, Teruaki Enoto, Takao Kitaguchi, Wataru Iwakiri, Yo Kato, Masaki Numazawa, Tatehiro Mihara, Hiromitsu Takahashi, Chin-Ping Hu, Yuanhui Zhou, Keisuke Uchiyama, Yuto Yoshida, Syoki Hayashi, Arata Jujo, Sota Watanabe, Amira Aoyama, Satoko Iwata, Kaede Yamasaki, Soma Tsuchiya, Yosuke Nakano, Takayuki Kita, Mayu Ichibakase, Hiroki Sato, Hirokazu Odaka, Tsubasa Tamba, Kentaro Taniguchi

备注：
22 pages, 9 figures, accepted for publication in JATIS
发表信息：
Journal of Astronomical Telescopes, Instruments, and Systems 12, 018002 (2026)
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AI总结：

NinjaSat在轨验证了X射线脉冲星导航可行性，通过优化轨道参数提升脉冲轮廓显著性，实现了高精度定位。

摘要：

本研究演示了CubeSat X射线天文台NinjaSat的脉冲星导航能力，该设备配备了两个气体倍增计数器（GMCs）。GMCs对2-50 keV能区敏感，每个模块在6 keV处的有效面积为16 cm²。我们通过观测 Crab 脉冲星验证了定时精度，并确认了在100微秒内的稳定定时性能。为演示脉冲星导航，我们应用了一种优化轨道参数以最大化脉冲星X射线脉冲轮廓显著性的方法，称为考虑轨道动力学的脉冲轮廓显著性增强（SEPO）方法。我们以不同历元对 Crab 脉冲星进行了约100 ks的总曝光观测，并分析了传送到地面的数据。通过将优化的轨道与来自全球定位系统数据的卫星位置进行比较，我们定量评估了导航性能。结果表明，沿 Crab 线方向的位置分量始终被限制在约40公里内，三维位置误差在不同观测历元下从27至370公里不等。这些结果证明了将CubeSat级X射线天文台应用于脉冲星导航的可行性，并提供了首次实验验证，即SEPO方法的精度依赖于轨道平面与脉冲星方向之间的季节性几何关系。

英文摘要：

This study demonstrated the pulsar navigation capability of the CubeSat X-ray observatory NinjaSat, which is equipped with two Gas Multiplier Counters (GMCs). The GMCs are sensitive to the 2-50 keV energy band and have an effective area of 16 cm^2 per module at 6 keV. We verified the timing accuracy by observing the Crab Pulsar and confirmed stable timing performance within 100 microseconds. To demonstrate pulsar navigation, we applied a method that optimizes orbital parameters to maximize the significance of the pulsar X-ray pulse profile, known as the Significance Enhancement of Pulse-profile with Orbit-dynamics (SEPO) method. We observed the Crab Pulsar with a total exposure of approximately 100 ks at different epochs and analyzed the data transmitted to the ground. By comparing the optimized orbit with the satellite position derived from Global Positioning System data, we quantitatively evaluated the navigation performance. The results show that the position component along the Crab line of sight was consistently constrained within approximately 40 km, and the three-dimensional position error ranged from 27 to 370 km depending on the observation epoch. These results demonstrate the feasibility of applying a CubeSat-class X-ray observatory to pulsar navigation and provide the first experimental verification that the accuracy of the SEPO method depends on the seasonal geometry between the orbital plane and the pulsar direction.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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