在GEO卫星上的窄频回应器和地面站之间的时间传输通道的表征
Ferran Valdes Crespi1,2, Pol Barrull Costa1,2, Angel Slavov1,2
1Fraunhofer Institute for High Frequency Physics and Radar Techniques (FHR), Fraunhoferstr. 20, 53343 Wachtberg, Germany.
Sensors (Basel, Switzerland)
|March 14, 2026
概括
本研究探讨使用静态卫星进行精确的时间传输,为脆弱的全球导航卫星系统 (GNSS) 提供了替代方案. 拟议的方法实现了微秒级的时间精度,证明了可行的替代定位,导航和定时 (A-PNT) 解决方案.
科学领域:
- 无线电天文学和卫星通信.
- 地测和地球物理学的地质学.
- 信号处理 信号处理
背景情况:
- 精确的时间同步和定位对于非静态雷达系统至关重要.
- 全球导航卫星系统 (GNSS) 是脆弱的,需要研究替代定位,导航和定时 (PNT) 源.
- 地静止 (GEO) 卫星作为时间转移的稳定提供了潜力.
研究的目的:
- 调查在GEO卫星上使用窄频回应器进行时间传输的可行性.
- 开发和验证用于基于卫星的时间同步的频道校准技术.
- 用GEO卫星来评估时间测量的准确性和可重复性.
主要方法:
- 在QO-100 GEO卫星上的窄频回应器被用作时间传输.
- 使用频道校准模型来估计信号传播效应和时间延迟.
- 进行了多个脉冲集成以提高时间测量的准确性.
- 测距测量与来自双线元素 (TLE) 集的卫星位置进行了验证.
主要成果:
- 在整合多个脉冲后,获得了大约1微秒的时间精度.
- 与TLE传播的卫星位置相比,距离测量显示出良好的准确性和可重复性.
- 有限的频道带宽 (2.7 kHz) 对可实现的时间测量准确性提出了限制.
结论:
- 具有适当校准的QO-100卫星是拟议的时间转移技术的合适.
- 这种方法提供了一个有前途的替代定位,导航和定时 (A-PNT) 解决方案,减轻GNSS漏洞.
- 进一步的研究可能会探索更广泛的带宽或先进的信号处理以提高准确性.
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