Dataset for intercomparison of Sen4GPP GPP products at fluxtower sites

This dataset provides the estimation of various gross primary productivity (GPP) products made within the Sen4GPP project at eddy covariance flux tower sites. These cover about the time range from "2018-05-04" to "2020-12-29" with an 8-daily frequency. There are 3 types or categories of products (LUE, SIF and ML) based on the 3 different approaches used in the Sen4GPP project to estimate GPP. For more information please refer to the respective ATBD and PVR documents of the Sen4GPP project.本数据集提供了Sen4GPP项目在涡度协方差通量塔站点生成的多款总初级生产力（Gross Primary Productivity, GPP）产品的估算结果。该数据集的时间覆盖范围为"2018-05-04"至"2020-12-29"，时间分辨率为8日频次。基于Sen4GPP项目中三种不同的GPP估算方法，数据集共包含三类产品：光能利用率（Light Use Efficiency, LUE）、太阳诱导叶绿素荧光（Solar-Induced Chlorophyll Fluorescence, SIF）以及机器学习（Machine Learning, ML）类产品。如需获取更多详细信息，请参阅Sen4GPP项目对应的算法理论基础文档（Algorithm Theoretical Basis Document, ATBD）与产品验证报告（Product Validation Report, PVR）。