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Optical clock technologies for global navigation satellite systems
GPS Solutions ( IF 4.9 ) Pub Date : 2021-04-05 , DOI: 10.1007/s10291-021-01113-2
Thilo Schuldt , Martin Gohlke , Markus Oswald , Jan Wüst , Tim Blomberg , Klaus Döringshoff , Ahmad Bawamia , Andreas Wicht , Matthias Lezius , Kai Voss , Markus Krutzik , Sven Herrmann , Evgeny Kovalchuk , Achim Peters , Claus Braxmaier

Future generations of global navigation satellite systems (GNSSs) can benefit from optical technologies. Especially optical clocks could back-up or replace the currently used microwave clocks, having the potential to improve GNSS position determination enabled by their lower frequency instabilities. Furthermore, optical clock technologies—in combination with optical inter-satellite links—enable new GNSS architectures, e.g., by synchronization of distant optical frequency references within the constellation using time and frequency transfer techniques. Optical frequency references based on Doppler-free spectroscopy of molecular iodine are seen as a promising candidate for a future GNSS optical clock. Compact and ruggedized setups have been developed, showing frequency instabilities at the 10–15 level for averaging times between 1 s and 10,000 s. We introduce optical clock technologies for applications in future GNSS and present the current status of our developments of iodine-based optical frequency references.



中文翻译:

全球导航卫星系统的光钟技术

下一代全球导航卫星系统(GNSS)可以从光学技术中受益。尤其是光学时钟可以备份或替换当前使用的微波时钟,由于其较低的频率不稳定性而具有改善GNSS位置确定的潜力。此外,光时钟技术(结合光卫星间链路)可启用新的GNSS体系结构,例如,通过使用时间和频率传输技术同步星座中的遥远光频率参考。基于分子碘的无多普勒光谱的光频率参考被认为是未来GNSS光时钟的有前途的候选者。已经开发出紧凑而坚固的设置,显示出10 –15的频率不稳定性级别,用于平均时间在1 s和10,000 s之间。我们介绍了用于未来GNSS的光时钟技术,并介绍了我们基于碘的光频率参考的发展现状。

更新日期:2021-04-05
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