Soil moisture estimates at high spatial and temporal resolution are of great value for optimizing water and agricultural management. To fill the gap between local ground observations and coarse spatial resolution remote sensing products we use SMAP and Sentinel-1 data together with ...
SMAP L-band brightness temperatures and Copernicus Sentinel-1 C-band backscatter coefficients are used to derive soil moisture data, which are then resampled to an Earth-fixed, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0)....
SMAP(Soil Moisture Active and Passive) 是美国的地球观测卫星之一,2015年1月31日发射升空。从名字就可以知道,SMAP主要为了观测土壤水分,并且有主动的传感器和被动的传感器。主动的传感器是L波段雷达,被动的传感器是L波段微波辐射计。计划中,雷达和辐射计各自生产3km和36km的土壤水分产品,并协同生产9km的土壤水分产品。
Given the limitations of current passive MW SM missions to obtain fine-scale (<5-km) SSM, several methods are under development, or have been developed, involving the use of finer resolution active MW data from other instruments. In particular, the Sentinel-1 (A and B) data stream has bee...
Evaluation of SMOS, SMAP, ASCAT and Sentinel-1 Soil Moisture Products at Sites in Southwestern France This study evaluates the accuracy of several recent remote sensing Surface Soil Moisture (SSM) products at sites in southwestern France. The products used are Soil Moisture Active Passive "SMAP" ...
E-mail: leifan33@swu.edu.cn Jean-Pierre Wigneron教授带领西南大学樊磊教授团队和刘向茁、王梦佳、马宏亮和王欢博士研究生,研究领域包括主动 (ASCAT和Sentinel)、被动(AMSR-E/2、SMOS和SMAP)微波遥感土壤水分和植被光学厚度算法、水文气象和植被...
has a 36-km spatial resolution (or 9 km via the resampled SMAP L3 Enhanced23,26product). Combining such passive sensors with a active sensor (e.g., Sentinel-1) and/or assimilating them into physical models can provide estimates with a 1–3-km27,28and 9–25-km29,30,31,32spatial ...
The Soil Moisture Active Passive mission (SMAP, Reichle et al., 2020a), run by NASA, uses radar and radiometers to globally map soil moisture, and makes the resultant three-hourly retrievals, with a spatial resolution of 9 by 9 km, openly accessible. However, the coarse resolution of ...
SPL2SMAP_SSMAP/Sentinel-1 Radiometer/Radar Soil Moisture3 km SPL3FTARadar Northern Hemisphere Daily Freeze/Thaw State3 km SPL3SMARadar Global Daily Soil Moisture3 km SPL3SMPRadiometer Global Soil Moisture36 km SPL3SMAPRadar/Radiometer Global Soil Moisture9 km ...
Joint Sentinel-1 and SMAP data assimilation to improve soil moisture estimates. Geophysical Research Letters, 44, 6145-6153. https://doi.org/10.1002/2017GL073904Lievens, H.; Reichle, R.H.; Liu, Q.; De Lannoy, G.J.M.; Dunbar, R.S.; Kim, S.B.; Das, N.N.; Cosh, M.; Walker...