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 ...
One advantage of using very high-resolution resolution Sentinel-1A/Sentinel-1B data in the SMAP active-passive algorithm is the potential of obtaining the disaggregated brightness temperature and thus soil moisture at a much finer spatial resolution of 3 km and 1 km at global extent. The ...
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、水文气象和植被碳循环应用等。
(2017) demonstrated soil moisture skill improvements through SMAP and Sentinel-1 data assimilation. Finally, the global SMAP Level-4 Surface and Root-zone Soil Moisture (L4_SM) product, which has been produced operationally by assimilating SMAP L-band brightness temperature observations into the NASA...
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 ...
SPL2SMAP_S SMAP/Sentinel-1 Radiometer/Radar Soil Moisture 3 km SPL3FTA Radar Northern Hemisphere Daily Freeze/Thaw State 3 km SPL3SMA Radar Global Daily Soil Moisture 3 km SPL3SMP Radiometer Global Soil Moisture 36 km SPL3SMAP Radar/Radiometer Global Soil Moisture 9 km SPL4SMAU Surface/Root...
可惜,L波段的雷达当年的7月份(2015年7月7日)就出现了故障,目前SMAP上只有L波段辐射计在孤独地观测着地球。不过,已经有人在研究将SMAP的L波段辐射计数据与欧空局Sentinel的C波段雷达数据结合反演土壤水分,时间分辨率降低了(3天→12天),但空间分辨率由9km提升到了1km。
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...
Also, the existing methods primarily focus on retrieving the estimated moisture level of the uppermost layer of soil, typically at a depth of 0 to 5 cm (Karthikeyan and Mishra, 2021), using Sentinel 1 data (Quast et al, 2023) and satellite imagery (Farahani and Ghayoomi, 2024; Ou et ...
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 ...