SM2RAIN-ASCAT (2007-2022): global daily satellite rainfall from ASCAT soil moisture

SM2RAIN-ASCAT is a new global scale rainfall product obtained from ASCAT satellite soil moisture data through the SM2RAIN algorithm (Brocca et al., 2014; 2019). The SM2RAIN-ASCAT rainfall dataset (in mm/day) is provided over a regular grid at 0.1-degree sampling (3600x1801) on a global scale. The product represents the accumulated rainfall between the 00:00 and the 23:59 UTC of the indicated day. The SM2RAIN method was applied to the ASCAT soil moisture product (Wagner et al., 2013) for the period from January 2007 to December 2022 (16 years), for version 2.1.2n. The rainfall dataset is provided in NetCDF format. A total of 16 NetCDF files, one per year, are provided. The quality flag provided with the dataset has been used to mask out low quality data, as well as the areas characterised by complex topographic, frozen soil, and presence of tropical forests. In addition to the daily accumulated rainfall value, also the rainfall noise (mm/day) is provided for every day. Version 2.1.2 should not be used due to an error in the precipitation data. Version 2.1.2n with respect to version 2.1 is calibrated anew and extended to December 2022. A GeoTIFF version of the dataset (v1.5) is available here: https://doi.org/10.5281/zenodo.2615278 A monthly version at 0.25- and 0.5-degree resolution (v1.4) is available here: https://doi.org/10.5281/zenodo.4570191 A sample dataset that can be used for testing SM2RAIN algorithm is available here: https://zenodo.org/record/2580285 Details on the dataset development and its assessment with ground and reanalysis observations are provided as: Brocca, L., Filippucci, P., Hahn, S., Ciabatta, L., Massari, C., Camici, S., Schüller, L., Bojkov, B., Wagner, W. (2019). SM2RAIN-ASCAT (2007-2018): global daily satellite rainfall from ASCAT soil moisture. Earth System Science Data, 11, 1583–1601, doi:10.5194/essd-11-1583-2019. https://doi.org/10.5194/essd-11-1583-2019. Simple Python and Matlab codes for the extraction of SM2RAIN-ASCAT rainfall at one and multiple station(s)\location(s) are available at (note that reader for versions <1.3 are not usable for version >1.3): https://github.com/IRPIhydrology/SM2RAIN_ASCAT_reader The SM2RAIN code in Python is available here: https://github.com/IRPIhydrology/sm2rainThe SM2RAIN code in Matlab is available here: https://github.com/IRPIhydrology/SM2RAIN_MatlabThe SM2RAIN code in R is available here: https://github.com/IRPIhydrology/sm2rainR Acknowledgements EUMETSAT Global SM2RAIN project (contract n° EUM/CO/17/4600001981/BBo) EUMETSAT "Satellite Application Facility on Support to Operational Hydrology and Water Management (H SAF)" CDOP 3 (EUM/C/85/16/DOC/15).SM2RAIN-ASCAT是一款全新的全球尺度降雨产品，其通过SM2RAIN算法（Brocca等，2014；2019）从ASCAT卫星土壤湿度数据反演得到。该SM2RAIN-ASCAT降雨数据集单位为毫米/日，以0.1度分辨率（3600×1801）的规则网格形式覆盖全球范围。本产品表征指定日期UTC时间00:00至23:59之间的累积降雨量。本次版本2.1.2n的数据集，基于ASCAT土壤湿度产品（Wagner等，2013）生成，时间跨度为2007年1月至2022年12月，共计16年。 该降雨数据集以网络通用数据格式（NetCDF）存储，共包含16个NetCDF文件，每年对应一个文件。数据集附带的质量标记已被用于筛除低质量数据，同时屏蔽了地形复杂、冻土分布以及热带雨林覆盖的区域。除每日累积降雨量数值外，数据集还提供了每日的降雨噪声，单位为毫米/日。 版本2.1.2因降水数据存在错误，请勿使用。版本2.1.2n相较于版本2.1进行了重新校准，并将数据时间范围扩展至2022年12月。 该数据集的GeoTIFF版本（v1.5）可通过以下链接获取：https://doi.org/10.5281/zenodo.2615278。 分辨率为0.25度和0.5度的月度版本（v1.4）可通过以下链接获取：https://doi.org/10.5281/zenodo.4570191。 可用于测试SM2RAIN算法的示例数据集可通过以下链接获取：https://zenodo.org/record/2580285。 有关该数据集研发过程以及基于地面观测和再分析资料的评估细节，请参阅以下文献： Brocca, L., Filippucci, P., Hahn, S., Ciabatta, L., Massari, C., Camici, S., Schüller, L., Bojkov, B., Wagner, W. (2019). SM2RAIN-ASCAT (2007-2018): global daily satellite rainfall from ASCAT soil moisture. 《地球系统科学数据（Earth System Science Data）》, 11, 1583–1601, doi:10.5194/essd-11-1583-2019. https://doi.org/10.5194/essd-11-1583-2019. 可用于提取单站点/多站点或任意位置的SM2RAIN-ASCAT降雨数据的简易Python及Matlab代码可通过以下链接获取（注意：版本低于1.3的读取代码无法兼容版本高于1.3的数据集）：https://github.com/IRPIhydrology/SM2RAIN_ASCAT_reader。 Python版SM2RAIN代码可通过以下链接获取：https://github.com/IRPIhydrology/sm2rain Matlab版SM2RAIN代码可通过以下链接获取：https://github.com/IRPIhydrology/SM2RAIN_Matlab R语言版SM2RAIN代码可通过以下链接获取：https://github.com/IRPIhydrology/sm2rainR 致谢 欧洲气象卫星开发组织（EUMETSAT）全球SM2RAIN项目（合同编号：EUM/CO/17/4600001981/BBo） 欧洲气象卫星开发组织（EUMETSAT）“支持业务水文与水资源管理卫星应用设施（H SAF）”CDOP 3（EUM/C/85/16/DOC/15）。