Benchmark dataset for Sentinel-2 B8A reconstruction from multispectral inputs

This draft contains the benchmark dataset prepared for the study on Sentinel-2 B8A reconstruction from multispectral inputs. The archive includes the global training set, four independent external test sets, and the associated metadata CSV files. Please complete the creator list, affiliations, and final license before publishing.本草案包含为基于多光谱输入重建哨兵二号（Sentinel-2）B8A波段的研究所制备的基准数据集。 该归档包包含全局训练集、四组独立外部测试集，以及关联的元数据CSV文件。 请在发布前完善创作者列表、所属机构信息及最终授权协议。