Atomic clock dataset for 'Coherent Optical-Fiber Link Across Italy and France'

Dataset of the comparison of the atomic clocks at LNE-SYRTE and INRIM via optical fibre link between October 2021 and February 2022. Results discussed in Clivati et al., Coherent Optical-Fiber Link Across Italy and France, <em>Phys. Rev. Applied, American Physical Society, </em><em> 18</em>, 054009, <strong>202<em>2</em></strong>. The involved atomic clocks are the Cs fountains SYRTE-F02Cs, IT-CsF2, the Rb fountain SYRTE-F02Rb and the Yb optical lattice clock IT-Yb1. Data is organized in folders, one for each comparison. In the folders data is separated is one file per day. Data is reported as fractional frequency ratios in bins of 864 s. Timetags are reported in modified Julian date (MJD). A validity flag is given where 0 = invalid, valid otherwise. Each folder includes a yaml file with metadata required for generalized data processing as in [Lodewyck et al., 2020]. The Python package used for data processing can be found on github.本数据集为2021年10月至2022年2月期间，通过光纤链路比对LNE-SYRTE与INRIM原子钟所得的数据集。相关研究成果详见Clivati等人发表于美国物理学会（American Physical Society）旗下期刊《Phys. Rev. Applied》第18卷、论文编号054009（2022年）的《Coherent Optical-Fiber Link Across Italy and France》一文。本次比对涉及的原子钟包括铯喷泉钟SYRTE-F02Cs、IT-CsF2，铷喷泉钟SYRTE-F02Rb，以及镱光晶格钟IT-Yb1。数据集以文件夹分组，每个文件夹对应一组比对任务；文件夹内的数据按日拆分，单日数据存储为单个文件。数据以864秒为时间分箱间隔，以分数频率比值形式记录。时间标签采用修正儒略日（modified Julian date, MJD）格式标注。数据集附带有效性标记，标记为0时表示数据无效，其余标记值均代表数据有效。每个文件夹均包含一个yaml格式的元数据文件，用于支持如[Lodewyck et al., 2020]中所述的通用数据处理流程。用于数据处理的Python工具包可在GitHub平台获取。