APOLLO clock performance and normal point corrections

@article{Liang2017APOLLOCP,
  title={APOLLO clock performance and normal point corrections},
  author={Yi-tao Liang and Thomas W. Murphy and Jr. and N. R. Colmenares and James B. R. Battat},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
  year={2017}
}
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… 
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