Evaluating and Enhancing Candidate Clocking Systems for CHIME/FRB VLBI Outriggers
Evaluating and Enhancing Candidate Clocking Systems for CHIME/FRB VLBI Outriggers
复制标题
评估和增强 CHIME/FRB VLBI 支腿的候选时钟系统
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
T. Cassanelli
中科院分区：
文献类型：
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作者：
S. Cary;J. Mena;C. Leung;K. Masui;J. Kaczmarek;T. Cassanelli
由于加拿大氢强度测绘实验（CHIME）已成为探测快速射电暴（FRB）的主要仪器，CHIME/FRB支腿将使用甚长基线干涉测量法（VLBI）以毫角秒精度定位FRB。CHIME站点使用被动氢脉泽频率标准，以尽量减少由于时钟延迟而导致的定位误差。然而，并不是所有的外伸站都能使用微波激射器。本报告介绍了用于评估在没有微波激射器的外伸支架站点使用的时钟的技术。更重要的是，由此产生的算法提供了校准方法的时钟，最初不符合VLBI的稳定性要求，从而使CHIME/FRB支腿保持真正的目标，具有毫角秒精度。
As the Canadian Hydrogen Intensity Mapping Experiment (CHIME) has become the leading instrument for detecting Fast Radio Bursts (FRBs), CHIME/FRB Outriggers will use very-long-baseline interferometry (VLBI) to localize FRBs with milliarcsecond precision. The CHIME site uses a passive hydrogen maser frequency standard in order to minimize localization errors due to clock delay. However, not all outrigger stations will have access to a maser. This report presents techniques used to evaluate clocks for use at outrigger sites without a maser. More importantly, the resulting algorithm provides calibration methods for clocks that do not initially meet the stability requirements for VLBI, thus allowing CHIME/FRB Outriggers to remain true to the goal of having milliarcsecond precision.