SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 2

This Level-2 (L2) soil moisture product provides estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) active radar during 6:00 a.m. descending half-orbit passes, as well as ancillary data such as surface temperature and vegetation water content. Input backscatter data used to derive soil moisture are resampled to an Earth-fixed, global, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).

Note: These data are Beta-release quality, meaning that they have not undergone full validation and may still contain significant errors.

本二级（L2）土壤湿度产品提供由土壤湿度主动被动（Soil Moisture Active Passive, SMAP）主动雷达在每日早6点降轨半轨道过境时段内反演得到的全球地表状态估算值，同时附带地表温度、植被含水量等辅助数据。用于反演土壤湿度的输入后向散射数据已重采样至地固坐标系下、采用圆柱投影的全球3千米等面积可缩放地球网格2.0版（EASE-Grid 2.0）。
注意：本数据集为Beta测试版质量数据，尚未经过完整验证，仍可能存在显著误差。