使用信标参考发射机和商用飞机的AERA的纳秒级时间同步
Nanosecond-level time synchronization of AERA using a beacon reference transmitter and commercial airplanes
摘要：
宇宙射线空气簇射的无线电探测需要纳秒级的探测器时间同步，特别是对于基于波前曲率的高级重建算法和干涉分析方法。在俄歇工程无线电阵列中，分布式自主探测器站通过全球定位系统进行时间同步，但全球定位系统无法提供足够的定时精度。因此，我们采用专用的信标参考发射机来校正我们的离线数据分析中的逐事件时钟漂移。在使用商用飞机发射的无线电脉冲对这种“信标校正”进行的独立交叉检查中，我们已经表明，这两种方法的组合定时精度优于2纳秒。
英文摘要：
Radio detection of cosmic-ray air showers requires time synchronization of detectors on a nanosecond level, especially for advanced reconstruction algorithms based on the wavefront curvature and for interferometric analysis approaches. At the Auger Engineering Radio Array, the distributed, autonomous detector stations are time-synchronized via the Global Positioning System which, however, does not provide sufficient timing accuracy. We thus employ a dedicated beacon reference transmitter to correct for event-by-event clock drifts in our offline data analysis. In an independent cross-check of this "beacon correction" using radio pulses emitted by commercial airplanes, we have shown that the combined timing accuracy of the two methods is better than 2 nanoseconds.
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