SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 9

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）土壤湿度产品提供了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时升轨半轨过境时段反演得到的全球陆面状态估算结果。SMAP L波段亮温已重采样至地固坐标系下的全球36公里分辨率等面积可缩放地球网格第二版（EASE-Grid 2.0）圆柱投影网格[并以SPL1CTB产品形式发布]，随后利用该网格化亮温数据即可推导得到网格化土壤湿度数据集。