SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants, Version 3
收藏DataONE2024-06-04 更新2024-06-08 收录
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https://search.dataone.org/view/doi:10.5067/4IYTBSUKM57Q
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SMAP Level-4 (L4) surface and root zone soil moisture data are provided in three products:
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM)
For each product, SMAP L-band brightness temperature data from descending and ascending half-orbit satellite passes (approximately 6:00 a.m. and 6:00 p.m. local solar time, respectively) are assimilated into a land surface model that isgridded using an Earth-fixed, global, cylindrical 9 km Equal-Area ScalableEarth Grid, Version 2.0 (EASE-Grid 2.0) projection.
SMAP四级（L4）表层与根区土壤湿度数据集包含三款产品：
SMAP L4 9千米等面积可缩放地球格网表层与根区土壤湿度地球物理数据（SPL4SMGP）
SMAP L4 9千米等面积可缩放地球格网表层与根区土壤湿度分析更新数据（SPL4SMAU）
SMAP L4 9千米等面积可缩放地球格网表层与根区土壤湿度陆面模式常数数据（SPL4SMLM）
针对每一款产品，均将SMAP L波段亮温数据（取自降轨与升轨半轨道卫星过境时段，二者分别对应本地太阳时约早6点与晚6点）同化至采用地球固定、全球圆柱等面积可缩放地球格网2.0版（Equal-Area Scalable Earth Grid 2.0，缩写EASE-Grid 2.0）投影进行格网划分的陆面模式中。
