GPM SSMI on F13 (GPROF) Climate-based Radiometer Precipitation Profiling L3 1 month 0.25 degree x 0.25 degree V07 (GPM_3GPROFF13SSMI_CLIM) at GES DISC

Version 07 is the current version of the data set. Older versions will no longer be available and have been superseded by Version 07.

The "CLIM" products differ from their "regular" counterparts (without the "CLIM" in the name) by the ancillary data they use. They are Climate-Reference products, which requires homogeneous ancillary data over the climate time series. Hence, the ECMWF-Interim (European Centre for Medium-Range Weather Forecasts, 2-3 months lag behind the regular production) reanalysis is used as ancillary data to derive surface and atmospheric conditions required by the GPROF algorithm for the "CLIM" output. The GPROF databases are also adjusted accordingly for these climate-referenced retrievals.

3GPROF products provide global gridded monthly/daily precipitation averages from multiple satellites that can be used for climate studies. The 3GPROF products are based on retrievals from high-quality microwave sensors, which are sensitive to liquid and ice-phase precipitation hydrometeors in the atmosphere.

本数据集当前版本为07版，旧版本已不再提供服务，且已被07版完全取代。

带"CLIM"标识的产品与名称中不含"CLIM"的常规同类产品的差异在于其所使用的辅助数据。此类产品属于气候参考（Climate-Reference）产品，要求气候时间序列下的辅助数据具备均一性。为此，针对"CLIM"输出版本的GPROF算法所需的地表与大气条件反演，本数据集采用了欧洲中期天气预报中心（European Centre for Medium-Range Weather Forecasts）的Interim再分析资料（ECMWF-Interim），其数据发布较常规生产滞后2-3个月。针对此类气候参考反演产品，GPROF数据库也已完成相应调整。

3GPROF产品可提供多卫星观测得到的全球网格化月均/日均降水平均值，该数据集可应用于气候研究领域。此类产品基于高质量微波传感器的反演结果构建，这类传感器对大气中的液态和固态降水水凝物具有敏感响应。