SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 8

This Level-2 (L2) soil moisture product provides estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) passive microwave radiometer during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. SMAP L-band brightness temperatures are resampled to an Earth-fixed, global, cylindrical 36 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) [and made available as the SPL1CTB product], and the gridded brightness temperatures are then used to derive gridded soil moisture data.

本二级（L2）土壤湿度产品提供全球陆面状态估算值，该估算结果由土壤湿度主动被动（Soil Moisture Active Passive, SMAP）被动微波辐射计在上午6时降轨半轨过境与下午6时升轨半轨过境期间获取。SMAP L波段亮温数据被重采样至地固坐标系下的全球圆柱等面积可扩展地球网格2.0版（Equal-Area Scalable Earth Grid Version 2.0, EASE-Grid 2.0），分辨率为36千米[并以SPL1CTB产品形式发布]，随后利用该网格化亮温数据推导得到网格化土壤湿度数据。