APOLLO时钟性能和正常点校正
APOLLO clock performance and normal point corrections
摘要：
阿帕奇点天文台月球激光测距行动（APOLLO）自2006年开始运作以来，已经产生了大量高质量的月球激光测距（LLR）数据。在此期间的大部分时间里，APOLLO一直依赖GPS训练的高稳定性石英振荡器作为其频率和时间标准。最近增加了一个铯钟作为计时校准系统的一部分，启动了两个时钟之间的比较活动。这使得可以在重叠期间校正APOLLO的距离测量值（称为正常点），但也揭示了一种机制，可以校正由于历史APOLLO数据中的时钟误差而造成的系统距离偏移。GPS时钟在1000 s时间尺度上的漂移通常会给APOLLO测量带来2.5 mm的距离误差，我们发现这平均可以减少到1.6 mm。我们在这里提出了一个表征阿波罗时钟误差，我们纠正历史数据的方法，以及由此产生的统计数据。
英文摘要：
The Apache Point Observatory Lunar Laser-ranging Operation (APOLLO) has produced a large volume of high-quality lunar laser ranging (LLR) data since it began operating in 2006. For most of this period, APOLLO has relied on a GPS-disciplined, high-stability quartz oscillator as its frequency and time standard. The recent addition of a cesium clock as part of a timing calibration system initiated a comparison campaign between the two clocks. This has allowed correction of APOLLO range measurements--called normal points--during the overlap period, but also revealed a mechanism to correct for systematic range offsets due to clock errors in historical APOLLO data. Drift of the GPS clock on ~1000 s timescales contributed typically 2.5 mm of range error to APOLLO measurements, and we find that this may be reduced to ~1.6 mm on average. We present here a characterization of APOLLO clock errors, the method by which we correct historical data, and the resulting statistics.
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。
