Dataset for the absolute frequency measurement of IT-Yb1 relative to IT-CsF2

Dataset of the comparison of the atomic clocks at INRIM between June 2021 and September 2022. Results discussed in Goti et al., Absolute frequency measurement of a Yb optical clock at the limit of the Cs fountain, Metrologia, 60, 035002 (2023). The involved atomic clocks are the Cs fountains IT-CsF2 and the Yb optical lattice clock IT-Yb1. Data is organized in folders. The data in the folder named 'INRIM_ITYb1-INRIM_ITCsF2-USO' is obtained making use of an optical-to-microwave chain. The data in the folder 'INRIM_ITYb1-INRIM_ITCsF2' is collected using an hydrogen maser as transfer oscillator. 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6月至2022年9月期间，意大利国家计量研究院（INRIM）内部原子钟比对数据。相关研究成果已发表于Goti等人于《Metrologia》期刊2023年第60卷第035002号论文《铯喷泉极限下镱光钟的绝对频率测量》（Absolute frequency measurement of a Yb optical clock at the limit of the Cs fountain）。 本次比对涉及的原子钟包括铯喷泉钟IT-CsF2与镱光晶格钟IT-Yb1。数据集以文件夹形式组织：其中名为`INRIM_ITYb1-INRIM_ITCsF2-USO`的文件夹内的数据，通过光-微波链路获取；`INRIM_ITYb1-INRIM_ITCsF2`文件夹内的数据，则以氢脉泽作为传递振荡器采集得到。 各文件夹内的数据按自然日拆分，每日对应一份独立数据文件。数据以864秒为时间箱的分数频率比形式呈现，时间标签采用修正儒略日期（modified Julian date, MJD）格式标注。数据附带有效性标记，其中标记值0代表数据无效，其余标记值均代表数据有效。 每个文件夹均包含一份YAML格式的元数据文件，可用于按照[Lodewyck et al., 2020]所述方法开展通用化数据处理。本次数据处理所用的Python工具包可在GitHub平台获取。